so this is my first boyfriend , and he has had sex with othergirls. the girl he had it with , i actually dont like because she always texts him and "tries to steal him back". he tells me that she once told him "i could ask you out if i wanted. but i know you would say no, and she (me) wouldnt even know." and i just do not like her, with a strong passion ! what should i do.. he always texts her even though he says he hates her. he told me they are best friends.. are my jealousy levels too high?