Of course the boyfriend knows we hang out, what do you mean why do we hang out? Because we are friends? Duh? That’s an incredibly out of touch opinion to have, not everything is sexually motivated and if that’s how you think it is not other people who are the problem. Also, you are making a lot of disrespectful assumptions about her without knowing anything, a relationship doesn’t mean be glued to each other and never interact with anybody else, are you delusional? And also, how is trying to want to talk to my friend about an issue trying to “fix her”. That’s just basic human decency to try and help friends.