Okay, a few points.
This wasn't about you at all, I suspect, but you are falling into the understandable trap of referencing this affair and this woman, in relation to you and your marriage.
Without knowing what reasons your H has given for his affair, I'm going to hazard a guess that it wasn't much in reference to the OW either. Put simply, it happened with her because she was "there". Hence, she was not "better" than you and it wasn't about you not being "enough for him" at all. I imagine your H saw there was an opportunity and decided to take it and it's as simple and painful as that.
It sounds as though once he was discovered, your H did at least some of the right things and took definite actions to apologise and distance himself from this woman - and that you overcame your pride, despite having to face the playground gossip everyday - and started on a path to forgiveness. That demonstrates a lot of commitment and faith in one another and so there is much hope in this situation.
Everyone makes mistakes in affair recovery because it is uncharted personal territory and one of yours I suspect, was in offering premature forgiveness. It would be unusual to be able to forgive only 5 months on and this may have had the effect of drawing a line under an event that needs much more unravelling and analysis.
So, first things first, you need to tell your H about your fears and that you're not moving on. If you haven't as a couple determined why he was unfaithful and you're still locked in a script of thinking this was about you, then it sounds like you haven't talked enough, or learned enough about why this happened and therefore how your H can prevent it ever happening again.
It's a horrible twist that you now have to see this woman every day and this must be making it ten times worse. You need to talk to your H about how this is making you feel and to co-construct ways of dealing with those encounters and daily reminders.
What I would urge you to do is to stop feeling you have to be so brave and that you should have moved on, because after only 5 months, that would be virtually impossible.
You are very welcome to search under my name because I have written many posts about post-affair recovery and at least some of them might apply to the type of affair your H had and this might help in your discussions with your H.
One of the best things that can happen after an affair is that as a couple, you become more emotionally honest with one another and open a window to eachother about your feelings. You need to do that now with your H and tell him about your continued pain. You don't need to keep a brave face on, with him of all people.