DD boyfriend returns after painful split. Advice please

[FedererFanMum]

You were very helpful when the split happened so here goes. DD BF ended it very suddenly a couple odd months ago with no reason. 3 weeks later he’s begging to come back, saying he couldn’t express his frustrations so over reacted (don’t ask me to justify this, I don’t get it, I want to talk everything through). She is convinced he’s not been unfaithful (I agree) and is very keen to have him back. He is seeing a therapist about being able to express his feelings. She is very happy but has listened to my counsel to take it slowly. He has a lot to prove IMHO and personally I would struggle with trust after what happened…
However, it’s her life and I don’t want to interfere so I have to accept he’s on his way back into our family. BTW, before this all happened, I really liked the guy. Anyway, what do I do? Act like nothing happened? Part of me is concerned about social awkwardness now but also, when do I let it go and accept him without feeling he’s about to bolt?

Let her live her own life. Far too many details posted here. She has to make her own mistakes.

You sound a little too involved. This is her life and her choices/mistakes to make and learn from.

Just act as normal with him. They'll have to work through this themselves. You're just in the background (for want of a better phrase) ready to support DD as and when she needs it. Its very hard watching them get hurt. Good luck to them.

You do absolutely nothing. When you see him, say Hi and treat him as you would have done before all this happened.

Either he's sorted himself out, things will go well between him and your daughter, and you'll be wanting to maintain a good relationship with someone who may be in your life for decades to come.

Or, he's an arse. In which case you don't want your daughter to feel like she can't tell you things for fear of making the atmosphere between you and him worse.

So keep things friendly with him, and keep checking in with your daughter to make sure everything is OK.

Is that more or less what happened to William and Kate back in the day?

Nothing you can do op.

Why do you need to do anything?

Agree with others.

You don't need to do anything other fhan be supportive to her.

If she wants to get back together with him, then you accept him.

If he does it again, you support her.

That's it.

What possible alternative do you have except to treat him normally? Refuse to smile in his presence?

I don't see what the alternative is to just being nice.