yeah - that stinks! but from what i've read in your other posts, your kids will both notice your absence and miss you significantly. it sounds like you have a very good relationship with your son and that he loves you a lot. i know that doesn't make the hurt about being excluded any less. but it is much more important. to both of you. i had lots of family birthday parties - but after age 3 i never had a loving father. i hope you can cherish what you do have - even though it is not what you wish you had - or what you deserve.
"the scariest thing about abuse of any shape or form, is, in my opinion, not the abuse itself, but that if it continues it can begin to feel commonplace and eventually acceptable."
- Alan Cumming, "Not My Father's Son"