Tic Tac Toe (itch) (My name's alric)

Just a small tic tac toe game I made yesterday. Please point out any errors or glitches. If nothing glitches, the A.I should never lose. The game is either a stalemate or a loss for you. Since I made the A.I, it only knows what I know about the game.  f there's any tactic that you know i may have missed, please tell me too.