Had girlfriend for 4 months. Had sex a bit less than 10 times since then, roughly once per two weeks (logistical issues because we both live with our parents).

I can't cum during sex and it's making me frustrated. I realize I shouldn't be outcome dependent, but sex doesn't even feel that comfortable for me (it hurts my penis a bit).

I usually masturbate once or twice a day with my non-dominant hand, no lube. No porn or anything, just my imagination. I finish in 10 minutes or so.

I intend to commit to 14 days of nofap, but has anybody else experienced this and found a way to succeed in cumming during sex? I mean if sex isn't even that pleasurable I don't see the need to plate a girl or anything.