Should i even start this up?

Well, i got a call last night from my buddy that was out at the pool in the apartments across the street. So i went over there, it was him his girl and her sister. I've met her sister before, and we had a lil chemistry from before i guess... Well, by the end of the nite we were makin out in the pool and all that good stuff. I've had nothin but one nite stands, call friends ect. for the past 4 years. I really want a serious relationship now, nothing tainted you know? the call bonansa is getting old, the thing is... Im going off to basic training in Kentucky next month, and after that ill be going to iraq in november. Im torn between what i want and what i know i should do. I dont think she knows im leaving, i guess this will turn into another call.... *sigh*