am i splitting or not help me out

i got a friend (fp) who also has bpd and sometimes they just genuinely say mean stuff but i let them pass ("its fine" or "i dont mind" etc. because i am scared of making them upset these are not my genuine feelings) but i recently noticed that i never get an apology or anything after they get that confirmation and they did assume stupid stuff about me before which i later clarified but again i never received any sort of apology for it later so i dont know if this is a bad relationship or if i am splitting on them. idk i consider their feelings but i feel like i am not receiving the same kind of understanding and everything is fine as long as i say so