AITA For basically hating a lady I don’t even know

So I, 23 F, have been going crazy lately about this and I’m starting to think I’m just an ass about this for no reason.

My grandmother, 67 F, has a friend (I’m not sure exactly her age but I’ll guess around 30) I’ll call her Summer. They met through church and then they started a bible group together after the church closed down.

Summer is married with 3 kids and one on the way, I’m don’t know their ages, but they are on the younger side, maybe 5 and under I think. Summer and my grandmother are great friends, my grandmother keeps raving about her and how amazing she is.

I have a 2 year old daughter who is very lively and loves getting into things even though she’s told not to. I’m also a single mom and pregnant with number 2. I just got out of a DV situation. (Just for some background information)

Anyway one day my daughter was getting into things and I was trying to get her to stop and started to get flustered myself. My grandmother turned to me and started telling me how Summer can read out of the Bible while controlling 2 little ones with just a leg.

Shortly after Summer invited my grandmother to her son’s birthday party and told her to bring my daughter. So my grandmother took her and apparently everyone loved her. (I was not invited)

After the birthday party they started inviting my grandmother to dinners every once in a while and they always take my daughter but I’m never invited.

One day my grandmother and I went to the store and while we were there we ran into Summer and her husband. I was standing there playing with my 2 year old while my grandmother and Summer were talking and the entire time Summer ignored me and didn’t even look at me. He husband smiled at me and spoke to me just a little but Summer acted like I wasn’t there.

Recently a family friend started planning a baby shower for me. One day my grandmother asked me if I would mind if she did a surprise shower for Summer during my baby shower. I was to scared to tell her I do mind but it’s been a few weeks and I can’t stop thinking about it. I feel selfish for not wanting to share my day but I also don’t know this lady and every time she is brought up I get so mad.

Am I crazy for hating this woman and feeling like my grandmother wishes she was her granddaughter and not me. Also for feeling like this woman hates me as well even though I don’t know her and she doesn’t know me?

So basically I’m asking if I’m the ass for being jealous and hating a lady I don’t even know?