I completely understand where you're coming from. Right after surgery, I felt the same way, until one day, my husband saw me completely naked (pouch and all), and said, "You are so beautiful." That rocked my world and made me realize that he truly loves me for me (just like your partner does) and that we can still have a passionate love life, because the pouch doesn't bother him at all. He's just happy that I'm healthy. On another occasion, he said, "What's the problem? You didn't have a vaginectomy!" LOL
What I did for me was to get some sexy lingerie and short nighties that I can put on to feel sexy. He (like your partner) could seriously could care less about
the pouch. You can also get some mini pouches to put on during intimate times, so you don't have to wear the everyday large one, which does make a difference.
So much of this is mental, so you have to make up your mind that you're going to have a great sex life, and just go for it. I suggest planning a romantic evening with wine (or your beverage of choice), dancing, sexy music, a fire in the fireplace, or whatever you two like to do, and I guarantee that once you two start kissing, the passion will take over and you will not even think about
it!