They talk to you and then disappear
Why is it, that you find someone you click with, you exchange messages back and forth on the dating site, app, and then exchange numbers, and then they just stop talking to you altogether. Or they stop talking to you on the dating site, just disappearing altogether. I am noticing this happening to me a lot, like last night me and this guy were talking for 1-4 hours, then I asked to video chat, and he said sure and asked to video chat on Facebook, so I linked him my profile, and he never video chatted or added me. I messaged him this morning asking what happened, but he just deleted my message and never talked to me again.
Another guy, I was talking too, we emailed back and forth then switched to cell phone texts, and we talked for 3 days, I asked him out, saying "Hey want to go to a concert in Downtown?" He told me "I am already in Downtown". Not giving me a yes or no to my asking out. He later texted me and still did not acknowledge me asking him out before, and we kept talking a bit more, and he then stopped talking, so I asked him straight out "You still interested in getting to know each other?" He said "yes" but never talked to me after that response.
Why does this happen? What do you think the answer is? Has this happened to you?