Hey everyone, 

I've really had this all on my mind for a while now. This is a pretty complicated situation, so please bear with me. I just really need some advice/a place to just let all of this built up emotion out. Here it goes...

My boyfriend and I have been together for nearly 2 years now. He and I started out as friends, and learned a lot about each other during this friendship. First of all, he's from the Philippines! He was born there, and moved here (US) when he was about 18. Secondly, he has a daughter! When he and I first met, this daughter of his was about a year and a half, and the kicker was she was living in the Philippines with her mom. When his daughter, let's call her E, was about 6 months old he and her mother split up, and her mother decided to move back to the Philippines and take E with her. My boyfriend would still communicate with her (FaceTime) all the time and stayed in her life as much as he could with the situation at hand. So fast forward, and he and I start dating. It was the summer of 2019, and it was the best summer of my life!! Every weekend he and I were out adventuring and living our lives to our fullest. We were always having fun, and it was like a dream come true! He and I even made plans to move in together, which actually happened in October 2019. But... around September 2019, I get news (out of nowhere) that his daughter is coming back to the US. Of course, I was so excited for him!! He was so happy to finally have his daughter back in his life. He and I talked it through, and I fully understood that now if we move in together, she'd be a part of the deal too. I didn't mind it, and like I said, we all wound up moving in together in October. E was shy with me at first, which was totally expected. My boyfriend would always reassure me, saying "it's okay, she was shy around me at first too!" So I kept pushing on. Went out of my way to be friendly to her and try to get along with her. Slowly but surely, though, things started going bad. She was REALLY clingy with her dad. She would always give me dirty looks whenever he wasn't looking. She would insist that her dad sleep with her in her room instead of in bed with me. Anytime her dad would hold my hand she would literally rip his hand out from mine and say things like, "my daddy!" Hell, he and I couldn't even sit next to each other without her wedging herself in between us. It got to a point where I HAD to talk to my bf about it, but he didn't seem too interested. He pushed it off as, "she's only 3! She'll grow out of it." This is all just skimming the surface of all the issues at hand as well. It would take me forever to type out all of the issues into this text *facepalm* 
Mind you, she is 3 now. We've all been living together for nearly a year, and not much has changed. There will be days where it's better, and there will be days where it's worse. My boyfriend has tried to put more effort into getting her to acknowledge that WE are the adults and we have a special relationship, but it seems so hopeless some days. 
I really do love my boyfriend, and I really could see us being together for a while. Hell, I'm going to CA to meet his family this December! But the issues I'm having with this little girl make me doubt all of it sometimes... will she really be the force to drive he and I apart? Will he and I really not make it because of this? 
I'm really trying me best to not be the evil stepmom here... but I just have very little hope left. Help????