Why would a guy ignore my texts and not answer yet watch my stories?

I talk to him once in a while, usually it’s always in a professional tone since we have similar jobs, we met in a dating app but he stopped pursuing me after we moved to another app, he always started talking to me but all his conversations were about him and how we have similar tastes and how he should marry me. But I never took him seriously because he would leave the min I started talking, so I knew he was just seeking for attention and all his conversations were about one story and himself. Until near valentines day he started texting me more and more and I barely texted him back, then I answer, and he says how cool i am as a person and amazing. I Dont think much of it and I text him thanks, then I start to wonder the sudden interest and I text him and he immediately asks me on a date; I say yes, but he disappears and even stops watching my stories. I talk to him a month later to congratulate him about his new adopted pet, he posted a story about it, then he opens up to me about an issue he had, and when he asked me how things were i just cut the conversation short. I felt like he been breadcrumbing me all year and once he had a chance to take me on a date he blew it. He usually would text me first and I would talk to him for a moment then stop and not continue if he doesn’t initiate, but now I texted him first two times after that and he didn’t answer me. Just watched my stories and only andwer if I post a pic of me then ignores me. I don’t understand the guy. He doesn’t answer my dms no more but still watches my stuff:

Why would a guy ignore my texts and not answer yet watch my stories?
Why would a guy ignore my texts and not answer yet watch my stories?
Post Opinion