Idk what to do and I'm desperate for advice..

[verysimple]

He has to say it....you can tell him and he might or might not agree...but it only counts when he says it on his own.

If you want to ask him something constructive...ask him in a casual and non threatening way what role he played in the "past relationships" he is talking about.

Pay close attention to his answer....

hmmm, interesting.. I'll be sure to have that question in mind. Thank you.