How I live without sex

I love sex but only if I really like the person I'm with. It's been 9 months since I had my last relationship, I don't know if it is normal I just don't get crazy about it bUt at the same time I know it would make me feel better, happier and in a better mood. I can't let go about the "feeling thing", all my friends say I should just do it if I feel like but I've done random sex a couple if times and I just felt so bad and plus I don't really trust in any guy :( help me girls