I'm not sure if this is the right place to post but maybe people here will be able to offer more solid advice. Reposting cause my first post description probably confused people. Some background information and some context. My bestfriend (26F) and I (26F) have been friends for almost 9-10 years and she is the only of my friends that I am this close to.

I'm bi and she is straight. At least she claims she is cause here is where things get confusing? Recently her behaviour changed. She is way more affectionate (emotionally and physically) than she used to be. She also texts me more often (almost every day and night) and we call eachother regularly. When we hang out she often links our hands together and sometimes she also likes hold to hands. However, I can't be sure if all this is because she is hitting on me/flirting with me or because we got closer the last years... and I'm also unsure of how consciously she is doing this. I'll offer some more context:

First of all, she doesn't seem to care much about having a relationship. So far she only had one short relationship AND lately she's been telling me stuff like: "You're lucky that you like both genders." "So how does this work during sex with a woman?" "There was this really hot woman at work. I'm straight but I have eyes." "There is no way I'll find a man with my standards but we'll definitely end up living together with our cats." Secondly, I got her an expensive gift she really wanted for her birthday and since then she sends me messages like: "Using your gift is the best part of my day." Thirdly, I remember discussing with her how I like my partner being able to pick me up like I weight nothing and the next time we met she picked me up and spun me around. Lastly, one time that we went out for dinner the waiter forgot to bring me a fork and my food was a little delayed. So my bf fed me herself some of her food. Something she has never done before?? Or for example, she will sometimes text me: "Good morning my (my name)." or "Goodnight love."

I don't know, perhaps all these are usual and "normal" for female friendships and I'm overthinking it but I'm not used to it and it's driving me crazy with confusion?? I don't know what to do or how to behave! Your opinions and advice would be greatly appreciated! I really care for her but these mixed signals are confusing me and I don't want to assume the wrong thing and fuck things up...

TLDR: My (26F) straight bestfriend's (26F) behaviour changed recently and I'm not sure if she is hitting on me/flirting with me or just being affectionate. She started doing things that she didn't before and all of these mixed signals are confusing me. I care about her but I'm not sure if I'm understanding correctly or if I'm overreacting/overthinking or just getting it completely wrong. Your opinions and advice on how to navigate this would be appreciated!