Feel guilty for not being able to cum with my partner /u/Dostoyevskey Sex

I’ve been on several different antidepressants for over a year and a half (currently on venlafaxine), and am able to finish when masturbating, but cannot cum when I’m with my partner, from hand/oral stimulation- even though I’m incredibly attracted to her and it feels good, my dick kind of feels numb/lacks stimulation and cumming feels impossible, even though I’m really turned on- is this a result or antidepressants or the impact of pornography, but I feel so guilty for not being able to show my partner how attracted I am to her, and my inability to finish is making me so frustrated with myself.

Anyone had any advice or suggestions with what could help?

I’ve been on several different antidepressants for over a year and a half (currently on venlafaxine), and am able to finish when masturbating, but cannot cum when I’m with my partner, from hand/oral stimulation- even though I’m incredibly attracted to her and it feels good, my dick kind of feels numb/lacks stimulation and cumming feels impossible, even though I’m really turned on- is this a result or antidepressants or the impact of pornography, but I feel so guilty for not being able to show my partner how attracted I am to her, and my inability to finish is making me so frustrated with myself.

Anyone had any advice or suggestions with what could help?