Replying to Bitches

So heres the scenario. Its my friends Ex hes not like my Best best friend but yes we do hang out quite often. So one night i honestly don't really know how it happened but anyways she ended up in my car needing a ride home, not thinking anything of it of course i have her a ride home. So then about 5 minutes away from her house she wanted food, well shit we go and get food then i said we need to go home. We then end up talking till 3 in the morning and i really dont know were these feelings are coming from. So anyways her Ex (my friend) says he still has feelings for her even thought they broke up 7 months ago. So now im in a pickle either pick her or loose him NS what are your thoughts.