AITA for doing what my "supposed" long time female friend told me to do, yet she's now upset about it?? Apologies for this long post btw

I (27M) and said Female friend (26F) have known each other for a long long time, 11 years in fact. At one point we grew feelings and expressed them, but as if the last few years I was trying to put in effort to see her as often as I could and she would always shut the idea down and come up with so many different excuses, each and every time I tried to plan something.

Fast forward to the last couple months, I've told her that I cannot be bothered to put in any more effort towards her as all she does is shut me down and make excuses, and sure enough she goes ahead and guilt trips me to make me feel like crap about it, I always call her out for it and every time she denies it.

At the time I'm writing this, nearly 2 weeks ago I was waiting for the train home cause I decided to detour for a few hours, as I'm stood around, I see a girl walk in and stands near me, we make small talk and so on, she then asks for my number and I gave it to her. The train shortly after arrives and we sit together and we chat some more.

I get off at my platform and I say my goodbyes to her (she lives further on). I tell my long time Female friend about it and at first she seemed okay with it cause I wasn't dating anyone.

The following Monday and Tuesday, the girl who I gave my number to texted me asking me to meet up with her and so I did, I met her and a few of her friends that same day, all lovely people.

When all her friends parted ways to go home, it was just me and her (25F) (I won't mention names), we just hung out, talking about stuff and enjoying each others company, we eventually sat somewhere quiet and we kinda go lost in each others gazes and what happened afterwards was something I haven't had in 11 years and it was so fresh.

(Earlier that day she said she fancied me a lot) It's the time where I need to head home, we're holding each other and I flat out ask her to be my girlfriend, and she said yes and we take a picture together before I headed off.

The next day my long time friend sees the picture and has a go at me saying "wow you moved on quick" (we never dated btw) and I said that I gave up trying with her and she knew this, I also said to her that if you won't let me see you then why should I have to keep chasing you??

I do apologise for this long post but this has been brewing in my brain since Monday when this all happened, I'd like to add that yes, everyone deserves happiness but this "long time friend" I've had, she really fcked me about over the last 5 years and I've had enough of her so I've officially cut her off and will not be talking to her again.

So I ask again, AITA ?? I'm expecting a lot of yeses cause men are always at fault for doing what's best for them apparently.