I was bullied by guys and now I don't trust men, any advice?

I was the one in school who always got bullied, in primary school i got called a slag for no reason I didn't even know what that meant back then! Secondary school I was picked on my boys, was called ugly and fat and one guy in my class pretended to fancy me and asked me out and then said it was a joke in front of the whole class including the popular kids and the boy I really fancied told me to go kill myself at the time I didn't think much of it but now I'm starting to wonder if it's affected me subconsciously he said it was a joke...okay I'm not the hottest girl in the world but when I'm out partying I talk to guys and get their numbers but it never goes further than that, I dread people seeing me without make-up and I don't wear clothes that show my arms and I have never had a boyfriend or slept with anyone as I feel they will be repulsed by what they see...I'm not obese but I'm not slim either, I'm curvy and have a little bit of chub around my stomach (which I am losing slowly)...I feel like slimming down but not too much as I like my curves, I think it will make me feel good about myself, I'm doing it for me - no one else. I just don't trust men....what do you guys think?