References for letting

[thismamabear]

I've been self employed for 2 years and found a house to rent for me and my son. The agent that showed us around said that was fine and I explained my first year of tax return was awful but last year I did well, made over £30k. I had to apply for the house from their website and basically fill in info about myself etc. He said he'd get back to me the same day to let me know if credit checks had been fine and if that was the case they could offer me the property. I had to pay half the rent plus their admin fee totalling £800 and then I could move in within 30 days. All credit checks went fine so I went ahead and paid him but then I get an email today from another agency asking for 2 years tax returns for income references. That's fine but my first tax return was awful as I had explained to the first agent, I made next to nothing and the 2nd one I have to do online tomorrow which indicates the £30k I made. My worry is whether they'll accept the 2nd year of tax return and if they don't, will I get my money back? I wouldn't have gone ahead and paid that sort of money if I was going to be rejected. I'm a bit worried now!

Hi Ladies,
I'm back on here after a few years away as this site has helped me so much when I had PND.
I've been with my SO for over 8 months now. He's Polish, I'm British.
He separated from his 12 year marriage after he caught his wife on her second affair. She ended up leaving him. He fell into severe depression, begging her to take him back. They split last December. I've been with him since February this year.
They share 3 children together, ages 3, 7 and 12. His ex is also Polish. Most of their families live in our area.
I've played an active role in his children's lives for the past 6 months. They are very close to me.
His 3 year olds birthday is next month and his ex has planned a party at a local play barn.
I asked him the other day what we should do for his little ones birthday. That's when I found out his Mum had planned the party. My partner informed me that he will be going to that but we could do something together after.
I felt so upset that he didn't invite me. I've invited him to every birthday/wedding that I've attended over these past 8 months.
I asked him why he had to go there with his ex and why we couldn't do something together as a family. He was furious and said he was going for his son. He then later said that he would like to see his ex sister in laws and his exes nieces and nephews as he hasn't seen them for a long time.
I don't understand if he's so bothered about seeing them, why hasn't he made the effort for so long when his ex isn't around.
I was angry and asked weather I have to accept that 3 times a year, he would go off to celebrate his kids birthdays with his ex and I wouldn't be invited. He said it would be awkward, him off playing with the kids, and me sat there at the table with his ex, her sisters and their mother all speaking Polish. I understand this, but it would have been nice to be invited. I feel insecure and left out.
Because she left him, he wasn't ready for the marriage to end, so I naturally feel a little on edge at the thought of them being alone together. This feeling is horrible.
I would really appreciate your views on this as I don't know if I'm being unreasonable.
I want my SO to be proud of me. I understand his kids come first, but I want to be a close second. Thank you in advance xx