FWB Situation Over Before it Starts?

Hello. I wanted to see what everyone here thinks about a very new situation I have found myself in. I am on dating apps and I’m eventually looking for a relationship but am also happy with just having some fun in the short term while looking for Mr. Right so to speak. I met a guy in real life on Sunday and we had a great time but he is not Mr. Right and I was honest about this and he said he just got out of a relationship not long ago and is happy to make this a friends with benefits thing. I agreed that casual and fun sounded like a great option and we hung out all day and had a lot of fun. The next morning I woke up to a text and a Facebook friend request which was fine because I appreciate not playing games and being direct so if he wants to hook up on social media and check in and say thanks for a fun time yesterday then great. But he texted me all day and then did that again today and I was at work so I couldn’t respond much and then I also had plans last night. So I didn’t respond for a few hours last night and once I did I said hey sorry I was out so I couldn’t respond and get assumed it was a date which it was. So he said good for me or whatever but then today text text text all day and I was busy so I didn’t respond much. After work hours I get another text that essentially says he has a date and is headed out so I say ok have fun and then he asks when he can see me again. He’s also been using pet names like sweetie and cutie and babe. We had a lot of fun on Sunday and having him around as a friends with benefits definitely fills a void in my life right now but usually when I’ve done this sort of thing it’s not ever day. I mean we are friends sure so let’s communicate but it seems like a lot and I didn’t sign up for this. So how do I say that without sounding like a jerk or being presumptuous? Or do I say oh well it was just the one date and tell him this isn’t for me?