I'm 29 years old,and I don't have friends.I was a prostitute and the past,but since 2006 I'm not anymore.I've got married,and now I'm a housewife.we have a baby,and i can say I'm happy,but I don't have friends.I'm not a shy person,I just don't have close friends.is that normal?

And yes it's completely normal.
it's best to have no friends than to have one that doesn't respect you or loyal to you.
I only have 2 close friends who are loyal and respectful to me.
I suggest you get close to people from PenPal or Facebook
And I think friendships are extremely important to your mental health.
Don't have to force it - volunteer, get involved with your kid's school, join a class... you'll meet people soon enough :)
By the way, it's not "abnormal" - it happens. Life carries us very far from where we started sometimes hey?
I try to focus on my family and let my man know that since I lack in friendships that his company is important to me. I just tend to feel like other ppl won't understand me, so I really don't try. Besides same sex friendships cause a lot of "competition" and opposite sex friendships can cause concern for your husband.
Also, you could be a "one friend at a time" type of person and there's nothing wrong with that.