DW, I don't know if this will help, maybe not. Please accept my apologies in advance if so.
When I suffered ED following my prostatectomy a dozen years ago (I was in my mid60s at the time) I was offered viagra and cialis. Unfortunately neither had the desired effect. In fact a had a bad reaction to cialis, it caused me severe pain in my legs.
So next I was offered a pump. But I have to be honest, right from the outset I had grave misgivings about using it. The very idea of using such a contraption to enable sexual intercourse turned me off big time. The whole process seemed grotesque. But of course, I recognised that I was not the only one affected by my ED, so I did my very best to make something of it.
But despite my best efforts I was still unable to achieve an erection strong enough for intercourse and eventually came to the conclusion that for me the damage wreaked by the operation had been too great.
So it was that both my partner and I had to come to terms with the reality that sexual intercourse was no longer possible between us.
The good news is that we discovered there was so much more to our loving relationship than sex, and fortunately enough our marriage is as strong now as it's ever been.
I fervently hope that your partner can work through his current difficulties with ED but even if things don't work out, please please, hang on in there, because as you say, you still love him.
When all is said and done, it is your precious love that can help you get through these difficult times and eventually go on to resume a happy life together.
Tony.