Tips on not ejaculating during sex?

So I took part in nofap around 7 months ago, and before that for about 5 months all I ever did was edge to porn and never cum. Recently I got into a new relationship, and at the start of the relationship I found that I could last around 3 hours in bed and kinda cum whenever I wanted too (which I often just didn’t do, I loved the idea of pleasing her and just stopping. Felt kinda like a power thing for me). Anyways, as the relationship got more serious, I find out she has this huge fetish for making me cum, and so I obliged for a while. But now I find I can’t really last longer than 10 minutes in bed. Any tips as to what I do?

Note* This is not me asking how to avoid premature ejaculation, this is me asking how one might avoid ejaculation completely. I don’t miss it. I have no urge or desire in that sense, and if my girlfriend ever wants it I want it to be through head or something as opposed to sex. So anyone who can last a few hours, any tips? I even heard things like anti-histamines can help. Let me know, thanks.

Mental discipline is all I use when edging. I have not cum in over six months. There is a line and you just can’t cross it.

I think it’s mental..

But, most of the time, I fail.. I just too enjoyed the, pressure of ejaculate.. And I cumin too,much.. I can cum twice a day. It’s bad

Not ejaculate at all is a good way to get random boners while stretching and destroy your stretching sessions.

Only if you’re weak willed I guess. Never had that problem previously.