Re: I feel like a horrible person
You know, just an afterthought, but that friend may be feeling left out too. Not that it excuses her behavior, but if she's a good friend, she may be feeling like you're "taking her place." See if that's a possibility. She'd most likely deny it if you asked, so you'd have to figure out a way to find that out on your own without asking, but it's a good possibility that it's a form of jealousy.