Really need some serious guy advice...(Really long story)?

(Names are changed) I have a friend named Susan... Well Susan 2 years ago dated a guy named Tyler...and one day me and Tyler got into a good conversation...and we started talking...well...I told Susan this and she was like ooo whats his name..thinking there was like a love connection going on and i was like his name is Tyler...and she was like what does he look like, and i described him and she was like I dated him 2 years ago...your not dating him are you..and i was like NO!! Just cuz we talk...does not mean we are dating...and besides you have Mike with you anyway...and she was like yeahh..but just dont date him....well later that day a girl named Nicole on my bus tried to set me and Tyler up...well Susan heard about it even though it did not go as planned. She started demanding that i could not even talk to Tyler at all. Well the next day I told her that I was not gonna let her dictate me around on who i could talk to...and that afternnon Tyler asked me out and I accepted. Now hearing this Susan now became friends with me again and was super supportive of me. Me and Tyler dated for about 3 and a half weeks...and then he dumped me last Tuesday. He told me he had a lot of stress on his mind...and then the next day I found out HE CHEATED ON ME IWTH SUSAN! Susan had dumped Mike and Tyler had dumped me so they could get back together...I got really upset....i told Susan i never wanted to tal to her again..as well as Tyler...because neither of them could actually tell me waht they did...I know Tyler still has feelings for me even though he used me...cuz he admitted it to me.....and even though he lied and everything i still have this sense he is gonna ask me back out in a couple months because i know him and Susan wont last...I made up with both of them but cant stand to talk to either of them because they only talk about each other when they are talking with me...I want to get him out of my head...but I cant stop thinking about him at all...and i know for sure he is thinking about me...i just dont know what to do...can anyone help??