Paradoxically, you can stand out by avoiding social activities. Try not to lose friends or alienate coworkers by rejecting their invitations over and over again. Social outings can be intimidating, especially if they're with people you don't know well. You may not always be invited to participate in your idea of a perfect evening. However, the ability to take part in a wide range of social activities will make you seem more normal and approachable. The easiest way to do this is to be open to making friends wherever you go. Try not to worry too much about cliques, or whether someone is your type. If you get along with them, your friendship will be perfectly natural and normal. Having friends will make you appear more approachable. and have good manners. Society thinks highly of people who are pleasant to be around. It is natural to be crass with your close friends with whom you feel comfortable. When aiming to make a good impression, however, try to be more polite. Meeting someone new is exciting, but there is a natural period of "ice breaker" discussions before you are comfortable with each other. Don't bring up intimate, personal topics (like health issues, sexual preferences, traumatic events, etc.) in conversation until you know someone. While you are getting the feel for a new friend, filter your language to avoid alienating them. Strong emotions are normal, even desirable. However, big, outsize displays of emotion (especially anger and sadness) can make people feel uncomfortable. Strive to regulate your emotional responses to small problems and constructively express your feelings. Don't shout, throw things, curse, or become violent. Whenever possible, express your displeasure calmly, quietly, and politely. If you get angry easily or have reason to think you're depressed, don't be afraid to contact a therapist or counselor. You aren't a "crazy" person for talking to a professional therapist. They can be simply a helpful voice as you go through a difficult time, or something much more important. It's normal to have intense opinions about certain things - political issues, for instance. It's even OK to engage in well-reasoned, sensible debates with other people about these things. However, if you frequently ridicule or attack people because their opinions are different than yours, you might quickly find yourself a bit of a social pariah. Instead, try to at least listen to others' opinions and be open-minded.
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One-sentence summary -- Participate in social activities. Cultivate an active social life. Be polite Don't share too much too soon. Control your emotions. Moderate your opinions.

Regardless of whether your mom is present in your life, your dad almost certainly has an understanding of periods. It's possible that he learned about it in school. He might have some knowledge about it from women in his life, like his mom, sisters, aunts, and so forth. Some people communicate better in writing than in speaking, so use that to your advantage. Come up with an outline of what you want to tell him. "Dad, you should know that I started my period." "There's been a change in my life lately, and it's that I got my period." "I felt uncomfortable telling you in person, and this feels easier to me." "I was afraid it would get too awkward if I told you in person." "I need feminine products, so can we go to the store?" "Can you give me money to buy pads?" "I need a pain reliever for the cramps I've got." This could make talking about your period less uncomfortable and make it funnier. "Aunt Flow" "Monthly visitor" "Red wave/red sea" "Crimson wave" He wants to be able to help you, and he wants what is best for you. "Thanks for understanding and supporting me, Dad." "I appreciate that I could find a way to tell you about this." "Dad, thank you for always being there for me." You do not need to write him a long letter all about how you got your period. Keep it short and to the point, and use an appropriately-sized sheet of paper or card to do this. You want to make sure you tell him what is going on and what you need from him, which you planned in Step 2. Use clear, legible handwriting so that your father can read your note. Start the note with a greeting such as "Dear Dad" or "Hi Dad." End your note with a closing such as, "Love, Susie" or "Thank you, Morgan." If you chose a small notecard for your note, it probably has an envelope. Otherwise, you can fold up your paper and slide it into a mailing envelope. You can seal the envelope by licking it yourself, or you can use an envelope moistener or a damp sponge. On the front of the envelope, address your dad by writing, "Dad," "Daddy," or "Father." Consider rooms in the house your dad frequently visits or items he frequently uses, such as his briefcase or laptop bag. Avoid leaving your note in a public place where someone else might pick it up. Leave your note where he will see it, such as on a counter near a gadget he often uses, inside his briefcase, or on his desk. If your dad does not approach you about the note, it is a good idea to ask him in a day or so if he read it. (Be sure to ask him in person). This way, you can know that he knows that you got your period and can help you get supplies. Be confident when you follow up with him. Ask him, "Did you get my note?" and let him know that you need to go to the store if that is the case.
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One-sentence summary --
Keep in mind that your dad knows what menstrual cycles are. Plan a draft of what you want to say to him. Make a suggestion that you come up with a code word for your period. Thank your dad for supporting you and taking care of you. Find a nice piece of stationery paper or a small notecard. Write your note to your father. Slide your note into an envelope and seal it. Leave the note for your dad where he will find it. Follow up with your dad to confirm that he read your note.