I'm 24, i lost my virginity when I was 14. It was horrible and I didn't have sex again until I was 19. I couldn't really get into it so I figured sex just isn't for me. Well in august I started having sex again and I'm loving it. The only thing is... I feel like I have an attachment to them. It's like I know it's just a one night stand or just a sex but In my head I want more and when it doesn't go my way I'm very upset. I don't want to feel like this but I do. 

Can anyone explain to me why I'm having this problem?