How to include your maid of honors boyfriend in wedding

He could be a reader during the ceremony or escort a grandparent to their seat.

View Quoted Comment Yes one of these

Are you close with him? If not I don’t think it’s necessary to involve him more than inviting him to the rehearsal dinner and of course making sure he can sit with her at the reception.

I agree with pp i don't think it's necessary if you are not close to him. my best friend's long time boyfriend i invited to rehearsal dinner but that was the extent of it

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We want to include him in the wedding day somehow.

I'd ask him to be an usher or man the gift table. That would be about the extent of it. Not to be a debbie downer, but if they break up, you wouldn't want him in your ceremony photos. If you're close to him independent of your sister's relationship, you could ask him to be a bridesman

There are many ideas that he could do like escorting people to their seats, readings during ceremony and/ or reception, handing out your programs to guests as they come, have him help with putting up decor and takedown, have him help with coordinating some vendors (if you are comfortable with him doing that). could he help one of the flower girls or ring bearers? Is there something specific you are doing during the ceremony or reception that he could help with? My BP has their SOs with them so they can look after kids and help with odds and ends type things.

Some people are happy just being guests without any responsibility beyond enjoying themselves. You don't have to give jobs to every single person in attendance.