Is my best friend unfair or am I overreacting?

So recently, my best friend got herself her first boyfriend and has become a bit...big headed with it. I am happy for them- I am. In no way am I jealous or anything like that. So that is not a factor. But when she's with him, she ditches me a lot more easily. Having spoken to other friends, they say that's normal. But she's become a lot more demanding of me also. If I cancel for a reason, often better than hers, she has a go at me and then posts all over facebook how annoying it is to have a friend who ditches you. A bit hypocritical. She also always tells me she never has money. Strictly, not true. She has her mother's credit card in her purse, has £2000 in her own savings and then £400 a week from her dad. We were planning a trip to Paris for just over £600 and she was wondering if my parents could pay. We're well off but we are not rich. I have £25 a week on top of my minimum wage. She is far better off than I am. But my parents are suckers. They paid for her train ticket that she said she "forgot her money for" but ended up spending £800 while shopping. Also I started my driving lessons on my 17th birthday and have been driving for seven months now with my test booked. She is older than me and on her 18th birthday had her first lesson. She then texted me after her lesson saying "you must be such a slow learner cause my instructor had me doing alll the sutff you are after one lesson!". I don't get competitive to that extent. But I was hurt for her to say it in such a crass way. Also, I got out of a pretty huge relationship and she continues to rub my face in her relationship- I feel. She begged me to come to a sleepover with her and her boyfriend and they went upstairs to have sex and left me alone in the living room until 12pm the next day. She snogs him and does... other stuff that I'll leave out, while I talk. And they whisper to each other. All these things are fine- in private! They beg me to come to the cinema cause it;ll be fun and then end up having sex in the rows behind me. And then she tells me about how much she hates those girls that can't be apart from their boyfriends. He really is a good guy for her and I am happy, I just can't help but feel I'm getting treated unfairly. I know friendships change with boyfriends but this seems extreme. I can't tell if I'm just overly sensitive or if she is actually being really unfair. I don't want to act unfairly to her and I'd hate for her to feel as upset as I do. Can you help ? :(