Hey, I think many of us are the same at the beginning. We are all a little over-emotional and sensitive and it's easy to beat ourselves up about any perceived 'slight'. I hadn't thought about the 'thank you' count, but I did used to read and re-read people's posts and for every 100 positive comments, used to focus on the 1 negative that I thought I heard amongst them. That obviously set off my feelings of inadequacy and despondency.
I think part of growing is recognising the good in others. People take time to respond because they genuinely care. It's about looking for the positives rather than the negatives basically and that takes practice.
Wanting to be liked is such a basic need. I understand you because I was the same.
Give yourself time. Focus on the good stuff. You're doing great x