Dear God, I Need Ex Help!

Ok, so a little back story, I'm 25 to my boyfriend's 35 and we have been together for about four months. Please understand I know this is not long and I acknowledge that. The point of my question is to make sure I am not being unreasonable.
 
A month into our relationship, my boyfriend broke up with me to see if things could work with his ex (a woman he has called the love of his life) from a year ago. Ten days later we got back together, but he still talks to her! It drives me nuts! 
 
This is a woman who he had sex with in the time we "were together ( the week we were seperated)" in the bed we now share a lot! He left me for her, he called her the love of his life! I'm not opposed to exes being friendly....but come on! Give me some time to heal! This was 2.5 months ago! 
 
Give me some time to heal before you decide to start this "friendship" up! I'm still hurting!
 
Is this rediclous? That have a lunch "date" next Tuesday and I am really struggling! They can be friends, but....not now.