When these feelings start to come up associated with your sexual problems, it becomes hard to think clearly. It may help you feel better to know that there is almost certainly a solution for your problem, and that many men have experienced these sexual problems at one time or another in their life spans. In the meantime, try to focus on your virtues as a lover and a human being, and remind yourself that you are still a worthwhile man no matter how your penis has been acting. There are a number of ways in which penises disappoint men. Almost all men have had a least a few experiences when they wanted an erection and didn't get one or when they lost an erection at some embarrassing point.
Many men have problems getting or maintaining an erection at the beginning of a relationship.
This may very well be your dilemma. After you become more comfortable with your partner, your erections may become more reliable. Try to view this as part of life rather than as a problem, and remember that these difficulties are common and transient. On another note, lack of ejaculatory control is probably the most common male problem. It's like, it happens when it happens, usually quickly and seeming to sneak up on you.