Confused and Broken

I’ve always had the worst luck when it comes to relationships. Not sure why someone can’t just love me and me only. I started dating the most amazing guy back in October. We have so much in common and we always have the best time together. He wasn’t your typical guy either. He was more interested in me then having sex. We didn’t start having sex until 3 1/2 months into our relationship. Everything was going great but then I felt he was pulling away but he assured me everything was fine. Last week we were on vacation and one morning we were getting ready for the day and I tapped his phone to see what time it was and I seen he had a notification on his phone that he had received a message on a dating site. I went numb after seeing that. I brushed it off because I didn’t want to ruin our vacation. On Sunday we were driving home and I had been thinking of everything I just broke down. I told him what was wrong and he told me that yes he was on a dating site prior to meeting me but wasn’t actively using it. I did some investigating and found his profile and one of the pictures on his page was from the end of January!! He told me he doesn’t know why he updated it but he’s not actively using it but has been active on the site all week. I’m so heartbroken and don’t know what to do. I am 40 years old and he’s 41 and I don’t have time for games like this. I asked him to delete it but he still hasn’t. He’s been active on the site today but yet he can’t even text me back good morning like he does everyday. I’m completely head over heals crazy for this man. I just want things back to the way things use to be. I want to be the only one for him. What would you say or do??