Hi 
This is my first post to bear with me, I don't know all the acronyms just yet!
I was going to say to cut a long story short but not sure I can shorten it lol.
Basically my daughter was born 7 years ago, during the pregnancy her dad wanted to move in and be a family, I wasn't in love so declined.
A few months after I gave birth I found out he had started seeing another girl, I found out because he'd been still seeing me and her at the same time and I got a few abusive messages. (I didn't know at the time).
Anyway since then she hated me, very jealous and he chose to not see our daughter to keep peace because it was causing arguments between all 3 of us.
The last few years he has been trying to see a lot more of my daughter but he is still with this girl, our last altercation was maybe a year ago because he has tried to initiate something with me every few months for 7 years and I was getting sick of being inundated with messages implying I was the one approaching him, so on a few occasions I have corrected her which didn't make things any better.
I want her to see her dad but in my mind because his partner dislikes me so strongly I feel like she'll treat my daughter differently to her daughter with him? Maybe take out her grievances with me on her while I'm not around.
I know this might be irrational but it's how I feel and I've had her to myself for 7 years, I'm not sure I'm ready to let her go if I'm not sure she's being treated fairly when she visits her dads family. I have asked him to spend one on one time with my daughter without his girlfriend which he has agreed but otherwise she is around all the time so will be part and parcel of the meetings.
I also heard her daughter, 5, was quite jealous when my daughter went round and was calling her quite hurtful names, fat ugly etc and I'm not sure how it was dealt with. My little girl is very sensitive and not used to being insulted so was very upset when she came back to me.
The last time I took her to see him, I went to collect her, we met in a McDonald's and sat and spoke for a while. 15 minutes in his girlfriend and her friends appeared from nowhere and were obviously there to keep an eye on us. She wasn't friendly. We had met near my home around 45 mins away from his so she had driven all that way just to spy...
I feel like it's time we all get past this silly situation because I do want my daughter to see her dad, but I can't help thinking with the lack of contact he will always put his other daughter before mine, as will his partner. I don't want my daughter to feel second best or get any ill feelings taken out on her. Like I said, she's very sensitive.
Sorry that was very long!!! It's been a few years coming lol so I apologise.
Any suggestions or advice welcome.
Thankyou