You become part of the problem when you choose not to vote. If everybody that chose not to vote actually voted the outcomes of elections would be very different. Unless you have a ballot that does not allow you to write in names you have no excuse for not voting. Taking the heard mentality of the lesser of two evils doesn't help even if you do vote.
I used to think that way as well. I did the write in thing. Do you think that actually accomplishes anything when the person you write in doesn't stand a chance? It doesn't. It's just one more worthless vote to count.