Should I marry/ commit my significant other?
Who you choose to spend the rest of your life with is one of the most important decisions you will ever make and one that not should be taken lightly. There are many ups and downs in life and it is imperative to ask yourself questions such as, will this person support me in troubling times, celebrate my successes, be faithful to me, listen to me, laugh with me, etc. You want he, she or they to bring out the best of you. Make sure you have had enough time with this person to truly answer these questions. It is better to wait and know for sure than to rush into this decision. 
It is also important to ensure you and this individual are aligned on things such as having kids, career/ personal goals, managing finances and overall expectations prior to making a lifelong commitment. 
Marriage can be tough but also the best thing in the world! I hope you choose someone who can show you just how wonderful it can be!