girlfriend introduces me as best friend? better explanation?

[gizmo]

Sorry, I posted this question before but left some crucial details, so let me try again.

So I met this girl at work, she had a bf, but we became best friends, hanging out every day, she would even sleep over a couple of times a week at my house. One thing led to another one night, and we had intercourse. then another night, and another. Obv she was cheating on her bf with me. I NEVER instigated anything, she is the one that always started it. anyways her bf found out, broke up w/ her, and I stayed with her.

We still kept seeing each other, turns out I got her pregnant, long story short, she had an abortion. That brought us closer, as she spent every night at my house for about a week or 2 to recover, both physically and emotionally. As time went on, we displayed affection towards each other in the bedroom and in public, kissing, holding each other and stuff. So I assumed she was my girlfriend. She kept introducing me as her best friend, I didnt mind at first, but she kept doing it over and over and I got mad. Its been 6 months since she left her bf, 5 months since the abortion. I confronted her about calling me her best friend and not her boyfriend. She explained that we never talked about it and I shouldn't assume that I was her girlfriend (she was nice about it, not mean). She said how she has always had a boyfriend since she was 17 and she wanted to figure herself out, have some time to herself. I told her, idk if you have noticed but you are my girlfriend and we have been in a relationship. Why can't you just accept that im your bf. She threatened to leave so that I would not get hurt and stuff. She said she loves me, and I said it too. She said 'boyfriend' is just a label, and u shouldn't care what ppl think. Its not that I care what people think, it just hurts (and i told her this too). She just kept saying, im sorry but im not ready to be anyones girlfriend.

So I let it go, we still kiss, hold each other, sleep together literal and not literal. The only difference now is that she stays over like 2-3 times a week instead of almost every day. She also just got a new job, so that may be why.

I know she loves me, she's said it a few times, and I love her. Now should I let it go and just let her call me her best friend, or should I leave before I get hurt even more? I am falling for her fast, very fast. I would love to just tell her if I cant be your boyfriend then we should just be friends. but I would miss kissing her, holding her and stuff, way too much.

I dont know what to do, any help would be appreciated, thanks.