Please help!

My son is 11 years old. His relationship with his grandparents (on my husbands side) has not been very close. My sister babysat my son untill he was five. We did not want to bother his grandparents becauase I felt that it would be too much for them. We never lived very far away from them; only 3 miles. However even then they did not often visit my son. I remember how angry I would get when they would just drive by the house and not stop to see thier grandson. Many times I would call and invite them over for dinner hoping they would say yes. I would think she would be excited because she could see her grandson. My fatherin law would usually come but my mother inlaw wouldnt. This would anger me more.

So about a year ago we moved next door to them thinking this would improve my sons relationship with them. Oh, my brother in law and his new wife also moved next door. My husband and his brother never really had a close relationship. I really dont like my brother in law very much and his relationship with my son is not close. Put it this way, he never made the effor to visit my son. Not even in the hospital when he was born and spent 10 days there because he was ill. Anyway, They recently had a baby who is now a year old. This is my point: My inlaws decided to babysit thier baby after complaining to them that it would not be a permanent thing. Its been almost a year, they are still babysitting and they have grown so close to him. I feel that they are ignoring my son. They seldom visit, we cant go anywhere with them because they are always babysitting. It makes me angry because I dont even get a phone call asking how their other grandson is doing. She spends allot of time, even on the day she does not babysit, with the baby grandson. My father in-law used to visit more than my mother in-law but now he hardly every comes over. We see them them outside and they just wave to my son. I have been very quiet towards them, and I think they have noticed that somethin is wrong. You can definately see the difference of how they feel about both grand kids. I guess you can say that I am jelouse that they spend so much time with the new grandbaby and I feel they are ignoring my som. My husband feels the same way but refuses to say anything. I am angry at my in-laws for acting this way towards my son but I do not know how to handle it. My mother tells me that I need to stop feeling this way but it is very difficult because the differences are so very obviouse. Should we just live with it or should we approach them about it? My son loves his cousin and we are careful that he does not hear us talk about this situation.