Am I cheating?

I was seeing a guy about 3/4 months ago. I found out he enlisted so I told him it’d be best to wait until he gets back from basic and see if he feels the same still. We’re going to the same university but he’s not going until Spring semester. We send letters to each other here and there. I recently started seeing a guy but it’s understood by both of us that it’s just a fling. Just a fun while before I leave to college. In the end, I don’t feel a sort of commitment to either yet. I’m hoping me and the guy from basic will reconnect in college & where it goes, but for now, I guess I’m just kind of having my fun.. am I cheating tho??