How can I let go to start a new life?

So my ex, I see him like all over the place. He hangs out at all the places I hang out. I tried saying hi and he said hi and everything and smiled but it's still really weird. My best friend told him on his birthday that I had sex with some Brad kid to make him jealous or upset or something...I don't know...but I kinda didn't feel like that was the best thing for her to do. I really want to be friends and be able to talk about things and have him in my new life but as a friend...but when I put it in my head he's just a friend I get scared. My dad went to give me a hug and a kiss on the check and I just felt weird.. Its like I'm afraid to let another guy touch me. I dont want to feel that way for the rest of my life. I Just need help on what I should I do???

Your still hung up on him. No it wasnt right for your friend to tell him lies, because now he thinks that you just randomlly sleep with guys now. Just give yourself some time to put your feelings in perspective and work out exactly how you feel for him, becos you went out its hard to see him as just a friend so you need to give it some more time, and dont pull away from your father becos of this!!! he is your dad and deserves affection, if another guy is affectionate then fair enough pull away if you dont feel right, but dont pull away from your dad.