Breakup!

Kirsty
Ok so me and the father of my baby broke up last Friday and he hasn't botherd to text or get in contact with me even though I'm 22weeks pregnant with his son. The heartbreaking part is although we've been together for two years his ex started letting him see his daughter again so he said he still has feelings for his ex, I really think I should write him a letter I want to hurt his feelings for leaving me an my son I would never stop him seeing him but he needs to realise ignoring me is not an issue is anyone else growing through the same or has any idea what I could write to him x