I went out with this guy from school and I broke up with him about 4 or so months later. I never told him all the reasons I did break up with him.

Ever since then he post loads on my Facebook, that he loves and comments on my pictures loads (saying I'm perfect and beautiful etc). He says he's in love with me, and keeps on trying to touch my bottom and slap it. Plus trying to kiss me, and succeeded a week ago.

Also all my mates and some other people say we should go back, we were the best couple in school in our year.

How do I let this guy down gently without hurting his feeling too much but making him realize I don't like him as much as he likes me?

I think that as long as you're honest and direct in telling him how you feel that's about as good as you can make it. Also, be firm... tell him it's over and you are not going to change your mind. Forget about what your mates say and do what is right for you!If he continues to harass you (in real life and on facebook) feel free to defriend him (in real life and on facebook).

It is time to just be honest, you can not control if he is hurt or not. You already broke up with him he obviously does not understand breaking up

I think you need to call him to break the news. Here's how you do it. You say exactly what I put down also be firm but still have a little sadness in your voice. Say " i know you like me but i just dont like you after all the things you have been doing to me. if u like me give some time like a year please. and after that if i like you. thoings werent ment to be. we can just be freinds" and if you are really mad at him talk to your mom she will help find the right things to say. Hope I helped!