ex boyfriend

my ex boyfriend went back home last weekend (to europe) he used to live at my house.  and chances are i probably won't see him again for awhile unless we get back together. i'm seeing someone else right now & he is talking to someone else. before he left, we didn't really want to be with each other. but since he's left, (almost a week) i feel like i want to try to make stuff work between us. am i feeling this way just because he's gone and i miss him? or are these my true feelings? keep in mind i'm really into the other guy as well. i'm really torn. one minute i want to be with my ex and the next i don't. any words of advice? i'm stuck.