AITA for confronting my friends about them not inviting me?

I have a trio friend group. We are all girls on our early 20’s (I’ll call my friends Sam and Mia). I met them in our first year of uni and we became very close because we were all new in town and very far from our families. Two years into our friendship, we started living together because we grew tired of uni dorms.

Last year, I dropped out, Mia graduated and Sam changed majors and she also eventually moved out to rent closer campus, but we continued being close friends and met every week. Until some things started feeling weird.

To fill the vacant Sam left, my man (Leo) moved in with Mia and me. At first it was great but soon I started feeling Mia didn’t like him much. They never really connected and none did an effort for it, so I was put in an uncomfortable position because Mia would tell me what she didn’t like about Leo, but wouldn’t tell him directly. She also started spending more time in her room and became very frigif to us.

Parallely, Sam became friends with a girl from her class and they invited Mia to party with them because she worked near campus. I felt left aside, but ofc I understood and wanted them to have good friends. The only thing I asked for was to meet Sam’s new friend so that we could all hang out together sometimes and they seemed to agree on that. Time passed and they never introduced her to me, they would cancel dates with me last minute and then I would find out they went out with Sam’s friend. Even after tellig them this hurt me, they kept doing it. Last night Mia told me she would spend the night out. When I asked her where she’ll be (I do this because we live together and I worry about her), she said they had planned a night out without me again. This really hurt me, partly because I had been asking to meet repeatedly for the past months (I couldn’t for a while because I was working night shift, but not anymore), and partly because she tried to hide it.

I thought maybe Mia needed a place to rest from me and Leo, because I understand living together is tiring to an extent, but I don’t understand why leave me so clearly on the side. I already spoke to them about this and they said I’m exaggerating and that I could just ask to go if I hear they planned something, but I still think there’s something not right about this. I also felt sad because the first year we met, I would invite them over anywhere to meet my other friends because I didn’t want them to feel alone in this big city. I have also told them that I feel alone lately because work is tiring and I didn’t have much friends there either.

AITA? Should I speak to them about this again or should I change something about my view?