Hi gay-gaf, new poster here!

(Be gentle!)
I've recently been in my first (actual) gay relationship over the past 9 months. It started out so amazing, with him texting me all the time, and us wanting to spend as much time as possible with each other. I was apprehensive at first about opening up completely to him, as I've kinda always been a reserved person, so I explained to him that it might take me a while to break my walls down and let him in, which he understood.
We grew to love each other and expressed it as often as we could every time we saw each other. We took as many trips as we could, every weekend, had an amazing sex life, talked about one day adopting kids and moving in together...
He cheated on me once, and it broke my heart. He begged me to take him back, we talked through it, and I did. I still had faith in our relationship, and chalked it up to being an accident of lust, nothing more.
Now at 9 months, I've learned a lot more: He's cheated on me with roughly 6 other guys (that I know of), had underlying relationships with some of them and me at the same time, and has apparently lied to me 90% of our time together. Everything I had and believed in is now just a crumbled pile of lies.
I hate to be so dramatic about it, but my heart is broken in a million pieces and I feel like I can't find the foot-hold to repair it. The scary thing? We're officially 'still together', even though right now he's hardly texting or calling me because he's talking to this 40-year-old something guy. We recently took a trip to Tennessee last weekend and he spent all of his time in the bathroom texting or calling this guy.
I feel so ugly and disgusting, and used. I opened up to him and I got betrayed in the end. I want to move on but it's the hardest thing to do because I still love him so much and I just wish he could see that.