Get a Clue

There's this person at school who dated one of my best friends for close to a year. Before they dated, my friend was telling me about this person and I encouraged that friend to date this person because s/he is very good looking and seemed sweet. They dated, and I was too busy with other things in my life to really talk to or hang out with my friend. Eventually, they broke up.
Now, this person is in one of my classes at school and sits next to me. Constantly chattering. It literally never ends. I sit there in solitude, trying to focus on something else, anything else, just to ignore him/her, but the silence is always broken. ALWAYS. And it's always for pointless and stupid things. I can't even say everything I want to say here, in case this person happens to read this. Ughh. I wish I could just not be in that class anymore. >:/