plugin won't work without wp-mvc activated

It’s not really a problem, more of a requirement.
Your plugin needs WP-MVC to be loaded in order to work.

I guess you could try to bundle your plugin and wp-mvc together so wp-mvc won’t show in the plugin tab.

Try moving the content of the wp-mvc folder in your plugin folder (so you will have my-plugin/core) and add require 'wp_mvc.php' on top of your my_plugin.php file.

This won’t work if you have more than one plugin using wp-mvc though.

I did it and worked, Thanks.

I guess what is better because users don’t need install the wpmvc for run my plugin. Is more easy

Glad it worked.
But keep in mind that if someone installs wp-mvc (for another plugin) while your plugin is activated it’s gonna break the WordPress installation (Fatal error cannot redeclare class XXX).
Removing the require 'wp_mvc.php' should be enough to fix it. Worth throwing a note about it in your read_me ??