How can I tell my mom I want to be alone without being mean?

I've been around my mom most of my life and even shared a room with her when I was younger. I was afraid to do anything without her or going anywhere without her. I even overheard her complain and compare me to my sister once about how im too shy/scared to do stuff by myself to her friends and wanting me to be more independent like my sister. Since turning 26, I've been comfortable doing stuff alone and going places by myself. I've always wanted to do (and done) a bunch of stuff like going on trips, moving away, etc and she always includes herself into my plans. Its starting to become annoying. I can't say this without sounding ungrateful but when I was a child my mom never wanted to do anything. I wanted to move away to another place, go on vacations, go places but she would rather stay at home with family. She even worked at her job for 17 years and never thought of upgrading or anything. But now that I'm an adult and doing things on my own, she has all these ideas she wants to do and tags herself along and I end up paying for everything too. If i talk about getting another job, she wants to get another job. If i talk about learning a new hobby, she wants to learn the hobby too. She ALSO doesn't like it when I meet a man and she becomes really mean and annoyed by me. The more I'm around her the more alone I want to be. I used to enjoy being around her all the time but for some odd reason I no longer have issues not being around her and like it more.

How can I tell my mom I want to be alone without being mean?
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