Hi OP
i was you a few years ago, although I found out about my DP’s affair after it was long over, so it was kind of like dealing with a ghost. Things are great now but it took hard work to get there
2 months is nothing, you’re bound to still be thinking about it all the time. The general consensus is it takes much longer but it’s one of those things where it starts off 100% of the time you’re thinking about it, then it becomes 90 which becomes 80 which become 70% etc etc
Youll know in time if his guilt/remorse is genuine.
in terms of practical things i think you really need therapy support if you haven’t already got it
Your partner also likely needs therapy but there is a chance he might be reluctant if it’s not something that has ever been in his worldview before. If he doesn’t budge and it isn’t a hard boundary for you then couples therapy down the line is an option but it might not address the reasons why he cheated which is really important, you could discuss that avenue with the therapist
Reconcilation is actually more common than we think, just there is stil a stigma attached so you often will ever know. I had no idea my relative had reconciled until my DP’s mess came to late and she decided to tell me her story (which was awful) to help support me
Andrew G Marshall’s site has good articles, you could read them and journal your feelings to get them out of your head. It’s really important your partner is willing to listen and talk about it all for as long as you need
https://andrewgmarshall.com/category/infidelity/
There is a Reddit forum dedicated to reconciliation. I did find some stuff in it useful but it is tough because the good news stories drift away, as I did. But the people on there are your peers in a lot of ways. However Reddit even there can still be a difficult environment to post in/read
best wishes op x