Need some advice. A new colleague started about a year ago, he is cute and I'll admit I fancied him - not a huge fancy, just a 'nice to look at' fancy. Didn't act on anything because we work together. We didn't speak much but fast forward a couple months, he began messaging me a lot on teams around Easter, nothing major just 'morning/how are you' etc, I thought it was a little weird because we didn't talk much in person but thought maybe he's just trying to make new friends (he was very introverted in his first few months and I kinda forgot about him tbh). Anyway, we end up adding each other on social media as I was going away in summer to a destination he's interested in and he wanted to see holiday pics (my suggestion to add me) which obviously increased the contact between us. By this point he is messaging me every day on teams and replying to most of what I post on socials so we're constantly talking and a bit of mutual flirting. I was actually starting to like this guy so when he asked if he could take my number out the group chat and message me I said yes. We we're texting for a couple of weeks but I then developed major ick and decided there is nothing to pursue so started being a little distant/short responses hoping he'd pick up on the vibe and stop messaging me. Sadly he hasn't and is still messaging me via teams/text almost every day. Today he said he checks my teams status every day to see when I'm online and always asks when I'm in the office (a certain song comes to mind lol). Any advice? I don't want to involve management and I don't think he would stalk me in real life or anything. I don't know whether I should say anything because nothing really started or happened between us but I suspect he still thinks there's a chance and there isn't but I don't know whether to say anything or just continue being a bit distant and hope that he eventually gets the hint??