I have had a friend who I used to work with for about 7 years now. Our babies are around the same age and usually we get on great. I split up with my ex when I was pregnant and she supported me through it. She has recently (over the last 6 months or so) been on and off with her partner (her DD's Dad) for various reasons but the latest couple of times for being involved in drugs and drug dealing. She has kicked him out and split up with him only for him to tell her he will/has stopped and he will come back - she's believed him and it's happened again.
The last time, she really sounded serious about ending it and I supported her through all of it, helping er sort her finances out, arrange childcare and just being there emotionally. She looked to me almost as a role model through all of it (her words not me being big headed 
)
We had a short break to centre parks in mind, booked time off work to take our LO's to later in the year but hadn't got round to booking it yet due to timings and money issues. I asked her last week if we were still planning it and she basically said she still wanted to go, but had got back together with her partner and was worried he would be annoyed if she took her DD without him. I've now said for them to go with their DD and I'll just leave it to avoid awkwardness and confrontation. AIBU to think she only wants me when he's not around and that I'm being used a little? Any opinions or advice what I should do is appreciated