stuck between 2 boys, advice please Options

[Caitlin]

Okay so this is a pretty long story.. There is this guy David that i like and he likes me too.. well he asked me out two months ago and I said okay but he still hasent talked to me ever since so I definately wouldent consider us boyfriend and girlfriend yet at least.. well then last month he said he loved me and I just got really confused because he barely knows me. He NEVER talks to me either because hes way too shy.. Then my ex-boyfriend comes into the picture and I dont know what to do about him. I mean I started liking him even after we broke up and this was before i knew David. Well I still sort of liked my ex when David asked me out and I started liking my ex more and more since nothing was going on with David.. my ex has a girlfriend and I know I cant be with him & i`m accepting that but then the other night he imed me and was like do you still like me? and I couldent say no to him so i blurted out that I still did & then we became better friends and all that. Well David still hasent been talking to me & whatnot and I know I should be talking to him but I just cant.
Today after school I went to the park to hang out with some friends.. then my ex and his best friend came later on and his friend was like CAIT... hes still in love with you.. and all this stuff and then my ex was like SHUTUP.. and he started stranggling him and punching his friend and he was like forget him cait.. c u around im like okay..
so everyone is telling me that my ex is still in love with me..
but i dont know what to do?
sorry this is twisted but any advice
I gotta talk to my ex too but i dunno what to say