Is it rude? mean? or bullying...

So I'm living in an apartment with 2 people
one of them is my friend(I hope she still is) I've known her for 2 years..Let's call her Cat and the other one is her friend, and I got to know her apon moving in.. Let's call her,, Marvl (I know it's marvel but the e is far away and marvl is easyer to write)

Well since I've lived there, Marvlhas been very rude to me but cat doesn't see it and protects marvland it has really broken my relationship with cat because I'm not the perfect person and it took me a bit to learn how to be a good roommate.

some examples are:
1. Only ever talking to Cat, even when Cat is around me. Or we are all sitting on the couch, Marvl will talk to Cat about stuff I don't know anything about, without an explination to me about what it is.
2. Abandoning me when we where supposed to go back home (this was an even where you needed to pre order or face a huge line) I did not pre order, she did and we where supposed to go home together because this was downtown...at night... She knew where I was, and it was about 10 yards away to walk and wait or notify me that they where going home.
3. She and I where both in the kitchen and she was cleaning(the first time I've seen herclean) and she walkes all the way down the hall to cat's (ad I's) room and asks Cat if we have a mop, when I was right next to her and she could have asked me.
4. She owes me over 70$ for 5 months now, but turns off internet for me when I don't pay internet (20/month) and I payed that all back, btu she still has not payed me back what she owes me.

Is it rihgtfor me to be extremly anxious when she is talking to cat? Is it right of me nto to want her to talk to Cat at all? Is it right of me to dislike being excluded from every conversation they have?

I need to tell Cat about this but since I have not been the best roommate Cat has gotten very angry with me and now I'm afriad to talk to cat..

And lastly, Cat was my only frined, She is threatening me to kick me out of the apartment at the end of the year but i that happens I have nowhere to go.. and I'll probaby kill myself because of the lonelyness.

Is what Marvlis doing Rude, Mean or Bullying.