Advice please?

So im an exchange student and have been in France for 7 months and supposed to stay til June. I got lucky and have an amazing family it's just the school situation. Everyone doesn't talk to me kinda like I'm not there they know I speak French now . I feel so excluded and lonely that it's become normal and when I saw my sisters last week I just broke and told them everything. Now she told my mum and she suggested I go home which is what I want to do but I feel guilty leaving the family when they planned shit for me to do with them. I just regret saying anything but you know when people keep asking what's wrong I always break . Should I leave or stay