My boyfriend and his exwife

My boyfriend and i have a fabulous relationship. i have 3 children and he has 2, aged 21 and 19 months. he and i are both recently divorced. we both agree that we are great for eachother, in that we seem to be all of the things that we thought we could never find in a relationship. we are both very caring and affectionate to one another, our conversations are fantastic, and we do truly love each other like we have never loved any one else. our personal relationship histories have not been wonderful, and we are glad to have had poor relationships so that we can really appreciate what the two of us have together.

He spends about 3-5 hours with his young son and his exwife every saturday, sunday, and all holidays from christmas to labor day. they get along well and have decided that this time together with their young son is vital. as a mother, i can appreciate the importance of both parents in a childs life, and commend them for wanting to be sure that the son has time together with both of them at the same time. the email eachother often, work at the same business, and while she works during the day, he takes great, great care of the child at her, their old house. so, he sees her and talks to her every single day. they have a work relationship, and email eachother, not only for the benefit of exchanging information regarding their son.

The problem is that i cannot seem to deal with their relationship. i do not feel threatened by her, i dont believe that he would go back to her and leave me. i cant pinpoint what it is that is bothering me, but it has gotten so worrisome that on friday afternoons, i am dreading the fact that he will spend so much time with her over the weekends. they do all the things that familys do. from grilling out every weekend to the zoo, the farmers market.... so much in fact, that i have a hard time listening to what they did with their day, what cute things their son did, what they made together for lunch, how their grocery shopping went, etc. because their lives are so very intertwined, she comes up in a lot of our conversations. he has NO other friends besides her and me, and she has no others than him. he has told me that he enjoys their time together, and enjoys seeing and talking to her. am i terribly selfish and uncaring? how does a person deal with an ex that has such a strong presence? i have expressed my concerns regarding this on more than one occasion, and i dont expect him to spend less time with his son. i would like to see him spend less time with her. he has told me that he will continue to spend time with them both, and even though i am head over heels in love for the first time at 37 years old, i dont think that i can stand that. i have been prettty good about the situation, i have not nagged him about it. most often i say nothing at all about it, it is his decision regarding his time with his son, and of course, i have no right to interfere with that. i am concerned now that it is contributing greatly to my depression, and is in fact, effecting my mood with my children when i know that he is off with them.

Please tell me if i am ridiculous, any reading materials would be helpful...i guess i am just looking for some advise on how to deal with this.
thanks

I understand how hard it is for you to accept this situation. But I am afraid that your relation will not last, if you make an issue of this.

Jealousy is a powerful emotion, and it is easy for you to be jealous in this situation, but you need to handle it. Is psychotherapy an option for you?