Mother issues/girl trouble?

Ok I'm 17 I've never Dated or even gone out with a girl I know what your thinking I'm afraid of women but I'm not I've never had a problem talking to girls and I don't fear rejection but I'm to intimdated to ask a girl out. But the truth is it's not the rejection that worries me its that I've never progressed from the elementary school phase of uh oh what if everybody finds out I like so and so. I know it's weird but I always find it scary that people will find out I like someone and what I fear the most is my mom finding out. You see i was raised by her alone and I've always been "the baby" I have this fear and anxiety of her finding out I like girls I feel like I must have missed a stage of development. I almost feel like if I asked a girl out and she said yes that it would be like me admitting I cheated on her I know that sounds messed up and weird but it's like a subconscious messed up thing in my mind. I mean I still answer the question "so do you like anybody in school" with no I'm pretty sure she's worried I'm gay which I'm not I'm just embarred for some reason that I'm not a child anymore like I'm disappointing her. What's wrong with me!!