I had the same problem you did, but eventually I buckled down and just did it. However, one thing that helped me keeping going was seeing progress in my concentration. Over time I could see a real difference in my ability to focus on the breath. I think when this happens it's very encouraging and it makes you want to continue the practice. If you're not experiencing any of this then I can see how the practice would wear on you.
Remember how fortunate you are to even know about the Buddha's teachings and to be able to practice. Don't take these matters lightly. It's imperative that you don't waste this opportunity. You know if the Buddha was alive right now he'd be urging you to practice so I'd heed his words and do it!
Make sure you start off small. If you're trying to meditate for 30 minutes right off the bat that's too much. I started off at 15/20 minutes per day. I recently bumped it up to 25, but that was after a few months. I'll eventually get to 30, etc.
Diamonds are made under pressure.