Taurus Gemini cusp girl with cancer guy?

hi, it's my first time here, so let me tell you my story (kinda long anyway)

I've known this guy for about 9 years now, since I'm in high school. I just moved to this city, and he is 3 years older than me and very wise, I'm not usually open to others except him, I tell him almost my familly problem, I should admit I have little crush on him 9 years ago but afraid to have romantic relationship with him because I don't want to lose him, and he had gf at that time.

Time flies, he move to another city and we still be friend but not as close as before, one year ago I move to his city and we started getting closer again. I know he just broken hearted by leo girl 2,5yrs relationship because didn't find any future because the girl doesn't want to settle with him. But he already bounce with another girl, 3 or 4 years older than him (sorry, I don't know her bday)

6 months after in relationship with this older girl he complaining to me and say that he already feel nothing with his gf, I'm so sad because I really wish his happiness. Then, I have this little girl friend, aqua/pisces girl, still young (7yrs younger than me / 10 yrs older than him) she's so smart and witty, but also cheap, I mean, she's been flirting with 5 friends (second base) in a month, then suddenly my cancer told me that he cheated on his gf with this aqua/pisces girl.

Idk why I'm so mad, I literally hate her because I thought he deserve someone waaaaaaaaaaaay better than her, I stop contacting her and blocked her. Yeah I know I'm so shallow, but I can't help it, he told me that he's happy with his aqua/pisces girl but still in relationship with his gf. I feel hopeless that time, mad with her because I still thought she's been deceiving him, confused why he's still with his gf, but also glad he find his happiness with aqua/pisces.

Around a month ago he asked me on a date in his house, and then we kiss. It just happened. He told me that he already ended his relationship with aqua/pisces girl after 3 months they've been dating.

Now with me it's been a month, we've been idk, dating? cheating behind his gf? It's torturing me because I'm so possessive and don't want to share him with another girl. I feel insecure and inferior because I always thought I'll never been enough for him. He's been so sweet and caring for me. He told me that he miss me and comfy around me. Our date always in his house, either cooking, watching movies, or even doing laundry, but we also going out for eat sometimes, and even have a one day trip to another city. I don't have problem with his moodswing or our date, I enjoyed it, and he is too. Most of the time I'm the one who chased him to meet up, he enjoys it because he knows I can't hide my feeling. I also always told him how happy I am around him (and I am!), but the fact that he is still have gf and they keep texting is bothering me so much (yes, he rarely meet her again because most of his time was with me).

He always avoid talking about his gf and never want to choose between her and me. It's killing me. I don't want to share him. Help! Is he playing with me or what? Can he choose between me and his gf?

anyway he is 17th July: Sun Cancer / Moon Aries / Mercury Cancer / Venus Cancer / Mars Leo
and I'm, 23rd May: Sun Gemini / Moon Taurus / Mercury Taurus / Venus Aries/ Mars Pisces

Leave him. Even if he's playing you, you are the one who allows it.. Have some self respect, ok?
Do not contact him unless he breaks up with his girlfriend first, then he has to choose.