Left for 4 months when I had a gf and it was great. Good luck, coming from me, I've lived away from family from 8 months and you don't realise how much you'll miss little interactions. Tbf I miss my mom getting me up from school and college and having responsibility because when you live on your own its all down to you which makes it hard but its all a part of growing up. I think a lot if I wasnt on discord, TS metagaming what would my life be like with 8 hours a day of free time after I go to the gym, cook, read and study. Really I'd have my flatmates and friends from uni, unless I went home. Don't hesitate to come back but leave for the right reasons.