They're still nice to me (I think mostly because they want to see their grandkids) but its hard knowing that I've disappointed them.
My parents shun me and my sister. Actually they kept the lines open with my sister, so as to be able to "witness" to her children, until her husband put a stop to it. It is so hard that the love parents show is confined to the "conditional" kind of love that their masters, the WT Society, allow them to show. It doesn't feel natural at all. It's like "if you accept our religion, then we'll love you... Otherwise you are not quite good enough". And FROM THAT attitude comes the idea that maybe we've disappointed our parents.
Actually your parents should be PROUD of you that you went to college and are making a success out of your life and your marriage. If they would think about it, they would have a lot to be proud about. However, when measured by Watchtower standards, what matters is how they look to their friends that their child was not "successfully raised in the truth".
Don't allow them to make you feel that you disappointed them. It's just sad that they can't agree to disagree about religion, and just carry on the regular family relationship without bringing religion into it. The shoe really could be on the other foot, that they are a disappointment to you because of how they treat you as an "outsider" now just because some men in Brooklyn, New York have said that their religion matters more than family!
since I didn't send a donation they weren't going to answer my letter
What about the scripture that says "anyone that wants, come drink life's water free"? This action to prevent you from access to more literature says all you need to know about the WT Society -- it's all about money and power over people! Your parents and my parents cannot see it that way, for to them the organization is perfect (even though the men are imperfect). But why belong to an organization that treats people that way?
Your questions were and are perfectly valid -- such as "if God is love, why is there so much suffering?". The WT Society answer that God has to allow time to pass to prove his side of the issue is not satisfying. How many more centuries need to pass, how much more needless suffering has to occur, and how many more innocent people need to die before God finally decides enough is enough? Why hasn't his case been proven a thousand times over already? It's natural to want to know.
Anyhow it IS all good to be away from association with the Watchtower publishing corporation (more a corporation than a religion), and into real life where we don't have to be constantly worrying about whether we have to give our neighbor a witness. Instead we can be real friends and give real help when needed, rather than pushing some corporation's ideology down their throat.