I need help

Im having a bit of a trouble with myself, I’ve been dating with the sweetest man ever, and he really treats me right… the thing is, we don’t have our own home so I just go meet him and stay with him for some days and then I come back home. We deal with our schedules of work and try to make it work. Its little time but it’s what we got.

The problem is, whenever its time for me to go home, I always cry, I’m not sure why, because he does make me really happy but I always end up crying and sad and even mad to go home

I don’t really know why i am like this but it really hurts me, do you have any idea of what could be causing this feeling?