Guy trying to get to know me.

Ok so I met this guy where I work. We are in different departments though. But he tries to give me his number and I realize that this is the sam guy that tried to talk to me a couple of weeks ago but I ignored him. So I put his number in my phone. I recently just stop talking to this guy that was my friends with benefits because he didnt want anything real. Which kind of hurted because I developed feelings for him and he knew it. So I texted the guy just because I was bored at work. I asked him about him and he asked me about me. You know how that goes. So he asked me when can he call me and me myself I want a relationshop with someone but honestly I dont know how anymore. Like I always have went into something with my open just opened. Now that it is shut. When he was like so when can we go out on a date to get to know each other I honestly didnt know what to say I didnt know whether to be happy or sad. My past guys have just turned me into this cold hearted female. So I started getting snobby with him by saying so what made you want to tak to me my tight pants that I have on he laughs and say no its just you. Im like yea I have heard that before. What should I do im single and I been single for a year of so because I was only tyring to be with that friends with benefits guy that I though would soon want something real but he dont. He told me that he is 19 then he told me today that I lied and I should be honest im 27. Still no big deal to me because I need someone that can be a father figure to my little girl because her dad is just sorry. I dont know my mother doesnt mind me talking to an older guy as long as she meets him. Im 17 and will be 18 soon. Help me out please I dont even know how to talk to him. Dont even no how to be just friends with him.