Lets start with the begging at first it was me and my girlfriend we were both the first for each other and we were having a good time but then after a while it started to go down. She decided that it would be better if we separated even though I didn't like the idea i said sure and we did. We were separated for about a month and during that time she had sex with another guy. I couldn't find it in me to try to date anyone else in such a short time but yet she did. After a month we got back together and it has been going great. She asked me the other day if i wanted to marry her and i said i don't know. I keep thinking on how she got over me so quickly and now it bothers me so much. Why do i care so much when we weren't even together? Just the thought of her having sex with someone else so quick after our break up makes me second guess everything. It makes me think does she really care for me now?