I am so bad

I met this old woman who works in my son school today and I vented out to her , I told her how we already had our summer holiday and that we have nothing to do for six weeks while he is off , she said that she can help with that and told me about many national parks and places she even offered to take us out with her when she goes to there and include us in her pass,, it was awkward I am not used to people just immediately offering help they usually just listen to me vent, I just nodded then blew her off, I told my husband what just happened and he was on the phone the whole time listening to our conversation, he said why did I do that? I told him that she was much older than me and that I prefer to have friends my own age, he said that all my friends have no children and cannot relate at least this one can! The reality is that I am not that social I have a list of friends that I didn't change in years some leave but I never add anyone to that list it only got smaller through the years, I went from having so many friends during university to barely one or two who I beg to do things together all the time,,in the end I was feeling very ashamed by how I reacted based only on her age, so I texted her later that day, I realised I was judging the book by it's cover and that I should take what I get, I think she was just lonely and I was mean to her .