I've always viewed giving anything of myself to be serious. There are so many 13-16 yr olds on here talking about having sex. I had my first boyfriend at 14 but that ended quickly because I refused to kiss him (so silly). I wasn't comfortable with him and I knew we were young and were very unlikely to last and I didn't want him to be able to say that we did anymore than just hold hands. Boys can be mean and nasty one minute they're like " hey beautiful" and the next "f*ck you sl*t" because you decided your not into him. I never did anything for a boy to say anything about and have it believed. I didn't have my first kiss til 16, and that was stolen by my boyfriend at the time, who I also never got comfortable with, I hugged him and was going to go to class and he refused to let me go until I kissed him. He thought it was cute; i didn't. My second kiss was on my terms, I found someone who I was comfortable with, conversation wasn't struggled, he use to try to do a lot of persuading for us to have sex ( we were hormonal) but he never did anything I didn't want to do. We were 17 when we started talking and we did foreplay or what not but didn't have sex until we were 18.  We've been together for 6yrs and are now married. I'm glad he was my first and only and I his. Have some worth, sex doesn't just happen its a conscience decision, there's no such thing as mistakes. Try to think long term rather than in the now.