Ok. well I was a single mum from two months pregnant, but slightly older at 28. But I felt the same. I met someone when my daughter was 8 months old.
You do need a boosted confidence when you have gone through your pregnancy on your own, it is only natural. You are not just a mum, but a woman as well.
I may sound like a mum now but just make sure that you are sensible. Have fun, but make sure that you look after yourself and your son.
You may make mistakes, but be true to yourself and your son. Many times I have had to think hard about what I was about to do and still got it wrong.
Enjoy your adult time, but don't ever let it get in the way of you and your son.
If someone does pay you a compliment or make you feel good then you know they are right don't you? :-)
Enjoy!