What should i do if i am dating some one new, but i am still inlove with an ex?

i cant get him out of my head, when ever i see some one that looks just like him i shrink down inside. and its killing me, and i dont get to see him until winter break. but the thing is that i have a really sweet boyriend now, but i cant get my ex out of my head, and he still has a thing for me..... i fear i might cheat on my bf with my ex, becuase when im around him i just feel free, i feel like i can be myself, I am usually the one giving advice to people but in my situation I have now, I am lost. I went out with my ex for a month and a half…… I am lost can some one please help me, I have asked my friends what I should do, and I don’t really get the answers, because they have issues them selves. Help me please!

What should i do if i am dating some one new, but i am still inlove with an ex?
im in the same boat i love my bf now but still care for an ex of mine, so when ever they are around i avoid them...go into another room, or just go out(my bf now is really good friends with him)...try not to go aorund him iv found that works best!
Reply:You need to stop seeing one of them. Its not fair...
Reply:What you ARE doing is hurting the guy you ar dating.