You love this girl and she loves you but she has a bf and is afraid to trust me what do i do?

you mean that she is already dating someone but she admits that she loves you but is afraid to trust you and dump the other guy? well then if the girl really loves you she would trust you. Tell her that. If she can't dump the guy then move on, she's not worth it. You don't want to cheat on another guy with his girl...it doesn't normally end well......