Unfortunately when you have a child your lifestyle must change. Although I have a husband, we never go out. We don't have an active social life either. Occasionally we will go to a friends house but it's with the understanding that our children come with us and we leave when alcohol or late hours come.
It's a rough life but far more rewarding to us because our children know they are our top priority.
I read a book about a man that was in awe of his mother. Raised by her alone and always a tag along as she went out with friends and dating he was in awe of his mother as a social woman that included him in all of her outings. I always thought I wanted to raise my children that way as an extension of me... It hasn't worked out that way. My children's needs come first.
I guess I feel that way because I was raised by a mother who's need for a man overshadowed her own mental health and welfare. Her mistaken notions put us in mortal danger more than once.
I felt uneasy introducing my oldest to men because of it. In the end I made the same choice a man over my child and I have paid dearly for it for the last 15 years.
I caution you against looking at your single friends and wishing for that life. You'll make sacrifices you will regret one day.
You also have to make a decision about having a weekend off versus allowing your child to see his father. My Ex complained a lot about not having the freedom I had since I was not the custodial parent. However, he was the one to cut off visitation and utlimately took the burden upon himself. He never loosened the apron strings either and when Jr.'s age would have brought on sleep overs and over night trips with friend's it wasn't allowed. Those are the days we both have to look forward to.
Unlike you, my sister is unwilling to babysit, my mother can't due to her mental health status, my mil can't due to her work schedule and caring for my ailing fil, My youngest sil and 2 youngest bils have drug problems, The older ones have children of their own and aren't willing to take on an extra pair for the night. We have no one close by. Generally there isn't enough money to pay a sitter and go out for any length of time and never over night.
Take heart, the children are only all consuming for about 12 years then you get your "personal time" back.