If you have made at least 2 moves each then you can't delete the game. If it is your opponent's turn to move then you can't offer a draw. All you can do is wait until your opponent moves, which might be never. Best thing would be to claim the timeout win and move on. Don't feel bad about it - it happens all the time.
@robert-sadlersaid My opponent timed out, but I'd prefer to claim a draw or even delete the game, instead of win by timeout.
If you just let the game sit there it won't do any harm until ,as a non sub you reach your maximum number of games in which case it will be in the way.
If you're bothered about your rating,you are better claiming the timeout sooner than later as your opponents rating will drop as others claim timeout wins and you won't accrue as many rating points