We are drifting apart

I guess I can't even saying we are only now starting to drift. It's been happening for a while.

And it really started the moment he sat me down and said I love someone else and she's amazing and she's already slept over at my place on and off for the past 2 weeks.

But when she left him high and dry after completely draining his savings, he came back after me and I took him back.

And my gut as well as my family and friends said not to take him back. But I did. And that's entirely on me.

Here we are 6 months after getting back together and I don't feel like this is love. He kisses me and I just don't like his kisses anymore. We don't talk as much. Don't see each other that much. However he does text me like crazy and doing random things like buying me flowers just because it's Tuesday. It's like he's still trying to almost win back my faith and trust in him. And I guess I can give a man points for attempting to win back the person he hurt. I have forgiven him but I will never forget what happened. We don't ever talk about it. I don't bring it up or put him down. Because I think that kicking someone while they're already down creates a toxic relationship.

I have a small feeling that yes he's trying but out of guilt not because he loves me. And we are drifting so much. In the past month we've seen each other twice. And once upon a time it was 3 to 5 times a week depending on work schedules.

Could I get some advice or input? I have all these weird feelings and I don't know what to do or how to act and respond