Is this girl leading me on?

I apologize for how long this might become in advance. So, last year I met this girl, she's really pretty and cool and we have a ton a similar interests. I am not going to go into depth about this, but she was actually the reason why I was able to come out to myself as gay. I instantly had a huge crush on her and it only grew the more I spoke to her. She is bisexual, but at the time I met her (and as of now) she had a long term boyfriend. He's actually a really great guy and the relationship isn't awful to my knowledge.

After my classes with her that semester finished I decided to try my best to distance myself from her. I was stringing myself along, she was in a long term, healthy relationship and I wasn't going to confess to her. I didn't want her to leave her boyfriend for me, she has had issues with BPD in the past and it sounded like he really balanced her out. And if I confessed and she didn't feel the same way, it would end our friendship and she uses me at a support system (which I have no problem with). When I had my classes with her she was always really affectionate towards me: She would tell me she loved me, that I was really cute, and also that her boyfriend was "worried about me". But I didn't want to deal with it so more or less I ghosted her.

A few months go by and one night I receive a really long text saying how she really missed me as a friend and that she doesn't have any friends. She invited me to her birthday party and I went. I still really liked her. At that point on I kept very minimal contact with her, but I still talked to her. I also hadn't come out to her yet, I hadn't come out to anyone. But I think some people can tell I'm gay when I say I've never had a boyfriend and I've never been interested in one.

I end up hanging out with her one day over the summer. I don't know why, but we just begin pouring our hearts out to one another. I tell her I'm gay, and some other things that I had never told to anyone. She tells me some things about her life. I remember being so mad at myself later on because I only liked her more at that point.

Now we're at a point in our friendship where I no longer live in the area, but I still go there often. We talk probably once a week briefly and she always sends me messages talking about how pretty I am, and how much she adores me out of the blue. I probably receive one Snapchat a week where she tells me I'm pretty and plasters a bunch of hearts on it. She sent me a message once at 3am asking me if she should break up with her boyfriend. She said they didn't want the same things in a relationship, she doesn't want to get married and have kids and he does. I sent back something along the lines of, "Do what feels right, just make sure you're making decisions for yourself not other people." I didn't want to say she should or shouldn't break up with him...

She also sometimes sends me Snapchats of her cleavage or something and talks about her boobs. I've also received some of the hickeys her boyfriend gave her... I know she seeks validation through other people, but I don't know if she knows I have a crush on her. I probably wrote too much, but do you guys think she's leading me on?