Working with a guy who's now dating someone else... 🤔

So there is this guy i work with and i kinda thought he was cute so we started talking at work and we sat down on our break and i asked for his snap... we started talking like everyday and he asked me out a couple weeks ago and he bought me waffles and starbucks and ice cream and he said he wanted to get to know me and maybe we would start dating. and yesterday hes like "i have something to tell you" and he said "i'm dating someone now" and he never even told me he was talking to anyone.. so i unadded him on snap and unfollowed him on instagram. this is why i've never had a boyfriend and i dont want one 😂 idk what i was thinking but 🤷🏼‍♀️🤷🏼‍♀️🤷🏼‍♀️ guys are just plain dumb and i'll stick to being by myself like i planned I guess lol.