Need Suggestions: Still feel older and "different" than other families

I'm being honest... At 46 years old with a 9 year old boy, an only child adopted from Colombia, I still feel frustrated hearing stories about pregnancy and the endless talk about so and so looks like mom, dad, etc. I thought that at this age, after this much time, infertility issues would be over. Instead it still hurts, of course not as much, that now my nieces and nephews are having babies and my sister-in-laws are saying, when I was pregnant I remember... It also bothers me, that I feel I'm being deceptive when I say my son was born in Colombia and that if I don't offer that he is adopted in the conversation, I feel like I'm lying. However, I've come to the conclusion its none of people's business how we became a family, but does that mean I have to always be careful what I say? I think the answer is yes. I'm mostly concerned about how these feelings will be felt by my son who is a wonderful little guy and is very sensitive. I want to find other Mom's who are older and who've adopted in my area but it just seems there is no one out there. "Everyone" is 10 years younger and hasn't gone through any of our experiences (wanting a kid in my twenties, trying for years to get pregnant, than my husband and I adopting when I'm 38 years old and he's 40.) Who do you talk to? I'm tired of being "the only one" who is "different." In Minneapolis we knew several people who had adopted, but down here in a much smaller community in SE Florida its such a "strange" thing, that I feel very isolated. People have said the strangest things to us, and I hope Lucas doesn't hear it, but he's bound to eventually (such as I "knew" he was adopted because you're both blonde and hazel/blue eyes and he's got brown eyes and brown hair.) When he was an infant he looked like us and does still a lot but as he gets older, he is no longer blonde and I feel guilty that I even am saying this. Thankfully L has tons of friends and we're so proud that he told his closest buddies up the street he was adopted from Colombia. They didn't believe him so he asked us to confirm it to them and they thought it was cool. Any thoughts or experiences? I feel I can't be the only one that has gone through this.