My new girlfriend and I had a threesome. Did she get jealous? Normally she is very attention seeking and why is she behaving like this? HELP?

Anonymous
Long story, see the UPDATE PLS!!

1.) I meet a great girl (A) at a nearby uni who I start to date and I spend my first time with. We really hit it off. After 1 year at uni, (A) then is going on an exchange for 18 months as part of her course. It's hard, I really miss her. But after talking about it, we decide to stay in touch as friends.
2.) During my 2nd yr, befriend another girl (B) at halls when I meet new people. She is an attention seeker, but I don't mind her. I think she likes that about me. She is hot (not as much as A), but I hear she has a long distance bf. Despite this she is very flirty with me? She tends to grind with other friends at clubs. At halls, she puts her feet on my lap and TOUCHES MY CROTCH at a party. I feel really aroused, but don't try anything. Later she tells me whether she should break up with her bf, I just say to do what she feels is right.
3.) 6 months later, B is single and suggestively touches me. I feel turned on when she asks me about a relationship. I don't like her in the same way as (A), but feel aroused, so agree to be bf and gf.
4.) I do find her very fun and it feels dirty to have sex with B. She knows I am less experienced than her and that I find her wild. I also give her attention and am kind to her.
5.) New girls arrive at halls, including C. She's really cute and I get on well with her. She becomes B's buddy in Spanish soc.
6.) On a night out, B grinds some random friend of hers and is clearly posing for pictures. I tell her I feel hurt. She panics and wants to make it up to me. For Valentine's day she dresses up real sexy and gives me my first head. I find it so hot and she likes how it turns me on.
7.) She still wants to make it up to me as I feel upset about how she gets jealous of me talking to any girl, yet she almost made out with a guy. She suggests a threesome with her friend D for my birthday.

Continued on.. UPDATE FOR THE POINTS 8 and 9!! See below pls!!

Why is she jealous of C, of A and of F?
She is an attention seeker. Wait for A, or ask out C or F. You deserve better than B. She is a terrible friend who teased you.
B loves attention and wants you as a backup. She's not a true gf. Even if you can't be with A, C or F, don't stay with B. Break up with this narcissist.
Break up with her. Request B's help to meet F who she was trying to block you with. If she is not a true friend, end the frienddship as well.
Request her to go through with the threesome properly and then break up with her.
B has every right to be upset even though she was trying to seduce you when she had a bf, and was acting like a harlot when she made your hers. Stay with her until you meet someone. She had a right to block you meeting F even though you were single.
Select gender and age to cast your vote:
Updates
+1 y
I have met D, one of B’s RANDOM friends, and clearly she is not as attractive as B and I don’t want to do it. But I say yes, if it’s with C. B hesitates, but then agrees. B, C and I go out for drinks with some others on the night, then B tells me C might not want to. When pressed, she admits SHE HAS NOT ASKED C and whilst touching my crotch says that some other girl E who is here might be up for it. I don’t like E either and want C. Eventually B says ok and goes to ask C who agrees! THREESOME:
Updates
+1 y
It literally feels epic. B and C started to kiss, and then kiss me and it felt great. B then starts giving me head, knowing how I love it when she does that. C joins in and I feel like I’m in heaven with a double bj. It gets WILD with B and C taking turns to have sex with me. C makes out with me and I LOVE IT. She gets me off with her feet near the end and I started moaning for her. I’m about finish and then looking at B she panics and says she has to go. B seems insecure the next day?
My new girlfriend and I had a threesome. Did she get jealous? Normally she is very attention seeking and why is she behaving like this? HELP?
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