Why do I feel Guilty

I broke up with my bf of a year a few months ago and im very happy. I have a crush on this guy but idk if i should date cause i am starting to make plans to move to germany next year after I graduate. Im so lonely but idk if its okay for me to date y'know. I feel kinda guilty even though the guy knows, i feel like i'm holding myself back ngl. What do I do, how do I stop feeling this way