Bridesmaid guilt - any advice?

Regardless of how you feel at this point, I think it's too late to ask her. You've already selected your bridal party and adding her as an afterthought, in my opinion, would be more hurtful than just not.

Agreed that it's too late to add her without it feeling like an add-on, but asking her to do something else for the wedding could be a nice touch!

I would generally say the same as the other ladies about it being "too late", but I completely agree with you about doing the right thing. You know your relationship with her better than we do, and if that's something you could be upfront with her about, I don't think she'd take it as you seeing her as "an afterthought". I can see how it would be difficult to tell if you want her up there or just always pictured it, so I think the best thing to do is ask yourself "Is my wedding/pre-wedding event going to be better or worse if she's included?"

If it's too much stress/drama to add her, then there's your answer. But I think if you find yourself really torn about not including her, it sounds like you do really want her to be a part of things. But that's just my two cents, best of luck to you in whatever you decide!

I agree with everyone else - you can ask her to do something special on your wedding day (but I wouldn't add her to the bridal party - especially if there is a risk of a falling out in the next few months!) Try not to feel so stressed about it because she will still be there to celebrate with you! If you do end up feeling like you regret your decision, you can maybe include her in some of the wedding party photos.