So Sad

Well I have a boyfriend but the truth be told I'm still in love with my ex I know its best that we stay apart but I just can't put that part of my life to rest I love him a lot more than he'll ever know I miss him so much but I'm too scared to let him know.... we look at each other in the halls at school in the cafeteria but I don't know what I should do because I've moved on psychically but not mentally I know I wanna be with him but should I just get over him and try to act like I'm done?