I Feel Uncomfortable

So the guy I talk to on my breaks at work asked me to get lunch sometime. I'm not going to though because he is in a relationship and I don't want to be "the other woman." Regardless of whether he says they're just together for financial reasons, the fact is he is still with someone and shouldn't be pursuing me. I would be just friends with him but he's made it clear he wants more than that today when he commented that we could kiss and no one would see us. ugh.. I'm just ready to find the right person. No more of this bullshit that is just unhealthy and a waste of my time. Please. I'm craving something genuine and sincere and lasting.