I'm a great believer in doing whatever makes you happy, and if that's sitting at home having a lazy day, I don't feel guilty about it. My DiL's mum is like action woman, she's on the go everyday doing one activity or another ... makes me feel exhausted just thinking about it! She's often trying to get me to take part in various things, and I honestly think she feels sorry for me sometimes. She probably thinks I'm lonely, but what she doesn't understand is that I actually enjoy my own company, and I love pottering around the house, cooking, researching stuff on the internet, reading books, walking the dogs, and spending time in the garden. I do socialize with a group of my friends now and again, when we can all manage to get together, and I'm in a monthly bookclub. I used to do private pilates classes with 1 or 2 other women (I don't like large groups), which I loved, but then my instructor left. I am about to start again, after a 2 year gap, but it's right what they say, 'use it or you lose it', as I'm no longer as supple as I was, so I'll be right back to basics again!Lol I also do the odd aquafit class, which I kind of enjoy, although sometimes I simply don't feel like going ... so I don't!
In answer to your question, I don't think you should be bothered. Try stuff, and if you don't like it, don't do it. And if you want to sit at home with a book and a cream bun, go for it! Life is too short to engage in activities that you don't really enjoy. Being in a happy state of mind, is far more important.