taking chances with military fellas??

So, ive been talking to a guy since may, & ive liked him just aint thot much of it bc hes been away with the military since end of june. Weve hung out before he left &had our first kiss the day he left. We have continued to talk and the other day he asked me to be his gf. I said yes, but now worry. Not quite sure over what just worry. Hes not coming home til april either....But, i told him i was only human & hes there and im here. That im gonna be open, honest, and just straight forward. If i cant do this or if something happens here im gonna tell him. Did i do the wrong thing? is this stupid?
When u like someone, & they are a million miles away it seems as tho u dont forsake precious moments with everyone else. You apart, but it gives u all the more determination to get close to them, & feels as tho ur hearts are warmly mended close together.
I figured, give it a try. But, shld i try or just not try? I guess only i can make the ultimate decision, but just lookin for some feedback! thanks so much everyone!