I think that's the wise attitude. You should invest in yourself and your son. While "friendship" is all well and good, I don't think that you can enter the dating scene without your date having the expectation that things have a potential to advancing beyond friendship. It doesn't sound like you are ready to give enough to a M/F relationship. Perhaps some male friends to do some things with?
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
It is hard to fail, but it is worse never to have tried to succeed. Theodore Roosevelt
