Should I leave him?

So make it as short as possible my boyfriend who I’ve been with for 9 years cheated on me when we were 7 years in and long story short it was the worst experience of my life (I’m sure a lot of you know what I’m talking about) well I took him back and it’s took me almost a year and a half to actually heal from it and ever since (since June-July of this year) I don’t feel as connected with him. I feel like while I was healing I was just trying to make it work and I seemed happy but now that I’ve fully moved on from it I can’t help but feel like I want to explore other people, I’ve only been with him intimately and I’m 24 so part of me feels like I’m missing out on things. I feel bad because I do think he’s changed for the better but after everything he did it just hasn’t been the same for me I used to live him to death and now I can’t even see myself marrying him. I dont know if I should take a break, leave him or just try to make it work. I’ve already talk to him about how I’m feeling and he told me he’s grateful I was honest instead of cheating i dont know I need help guys…🙁please don’t judge im lost right now