Boyfriend problems

I've been dating this guy for 2 and a half months and I was even getting the feeling that I loved him but these out couple of days I haven't liked him and he's got on my last nerve and I don't know how to talk to him without being rude or him driving me insane.. 😭 I don't want to hurt him bc he's really sweet and I've just started taking my adderall again so that might be the problem bc it makes me act weird but I just don't know what to do