Good on you for trying and putting yourself out there. Maybe next time do a little homework and finding out if she is dating anyone. Also talk to her more and find out how genuine she is about being nice to you.

This boyfriend is seriously insecure. Somebody should suggest that he sees a psychologist before he performs a trans-occipital implant on someone. Not you, though; you don't want to be his guinea pig.

call the cops on him

Gimme three steps. Gimme three steps, mister.

Hi. I know it doesn't feel that way right now but, trust me, the trash has taken itself out. A girl who can't even graciously decline a genuine, straightforward request with something like 'Thank you, I am flattered but unfortunately I have a boyfriend' is not worth your time or your tears. On top of that, it seems as though her 'type' is an insecure jerk who has to hide behind a gun. It looks like she doesn't have an eye for a real man anyhow. Don't worry about her, just work at being the best version of yourself and one day the girls will be beating your door down. Be the watering hole, not the hunter.

Definitely call authorities on that guy, see what kind of man he his when he's in jail. As for her, if that thing is what she considers boyfriend material then you are better off without that.