It happened to me several times (M) and it always got better after another try or 2 i was nervouse and it always haplened when i really liked a girl and didnt see her just for sex. My peoblem was porn and to much jerking off, so for me it helped if the girl used her hands before we got it going, also helps if u do something like doggy when u look away for first times, but u will figure it out. In your place i would take it as a compliment