<human>: I know this is a very simple question, but this is the first time I've really "dated" in the conventional sense.

This guy is sort of a "friend of a friend" from a long time ago, so I would call him a long-time acquaintance. We recently saw each other at a bar, and he asked me out a few days after. We've been on two dates, and they actually went pretty well! But there are a few things going on that make me want to discontinue this.

1) I just ended a PAINFUL long-term relationship about a month ago. Even though I'm totally over the guy, I'm still a little messed up from the emotionally disasterous relationship itself. And this new guy is the "always in a serious relationship" type who is almost definitely looking for a serious gf.

2) I am seeing someone else. We are also just dating, but it's casual and fun, which is a lot more of what I'm looking for right now.

3) I just don't think we clicked! Unfortunately he thinks we REALLY did.......

Anyways, I'm not sure how much information I have to give him when explaining why I don't want to see him anymore, so this is one question I have.

My main question is HOW? He's ALWAYS texting me, and we don't spend any time talking on the phone or anything, so it might be weird to call. But it doesn't seem necessary to tell him in person or anything. Is it completely ridiculous for people our age to say "no thanks" to future dates via text? Obviously calling is a lot more stressful, but if it's the right thing to do, I will.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I'm not too familiar with dating, and I have no idea how to tell someone who's really interested that I don't want to date anymore.