You cannot convince that person that would be like forcing them to realize that you two were meant to be. If the other believes it then it was meant to be, if not then it wasn't.
You cannot convince someone to love you. That is something that naturally happens. Just be yourself and if he doesn't like you for who you are then you obviously aren'y meant to be. You'll find your match someday.
You let her go. Or you convince her otherwise. If you truly love her, though, you'll let her go; to love someone is to prefer their happiness to your own. If it is meant to be, it will happen.
You can convince someone that karaoke is good by constant exposure and lots of practice.
To convince someone you must sway them.
Come on to them.
If you expalin what an "AIM" is, perhaps someone can help.
To convince someone to see your view on things.
By acting crazy
Have sex with them
That means your cheating on someone.
Convince, recruit
A person who is hard to convince can be called stubborn, or possibly closed minded.