Should she accept this guy for life time?

Hi all, My frnd has a boyfrnd. They are in a relationship for 2 years. and they even got engaged. but due to some reason the engagement broke. and she still loves him. the point is wheter his love towards her is true or nor. Recently when they were having an argument he started talking abt her ex boyfrnd and started telling her that she is been F**ked by him. but thats not the fact…and now he appologises that he said all that in anger. But if a guy can speak something like will he not speak like that again after marriage? and he even said that she was into one more guy who is her close frnd. please advice … its a big confusion to judge this guy. should she go ahead? or not. they keep quarreling abt thr breakup and he keeps blaming thst its all her mistake. Ma frnd is frm a very well settled family. The guy is still struggling to get settled. and his family is not that rich too…but she has every luxury in life. and she just expects someone to tale care of her. She ven feels that he lies her a lot. she is continuing this relationship caz he takes care of her when they are together.. I know this is too complex but plzz help!