Why is my mother won't let me see my boyfriend ?

How old are you?

1. age
2. age of boyfriend
3. past trust issues
4. behavior of boyfriend
5. she loves you and wants better for you

I am sure several if not all of the above will work

We really are going to need some more info in order to even attempt to answer that question. There are countless reasons a mother wouldn't let her child date someone all factor dependent.