Help⚠️

I've liked this guy for a while now but whenever we hang out our mutual friend is there.The friend and the guy i like we're friends before me but i've got pretty close with both of them but some times i wanna ask the mutual friend something about him but i don't want her to feel like i'm using her.Shes made it perfectly clear she has no feelings for him but i also feel like what if he likes her. Anyways I don't know how to talk to him cause he makes me nervous and i don't know how to become better friends with him 😫🤷🏻‍♀️

Any suggestions?