I am confused - How do I proceed? Did I overreact?

Met a guy 21 years older than me, I'm 31, am attractive, educated, & well rounded with hobbies not desperate. He had qualities & looks I was attracted to.

Date 1 (Friday) - Fun date & we equally asked each other questions. He requested I say "hi" to him at an event the next day. I was planning on going anyways so I did very briefly.

Date 2 (Friday)- I asked him more questions than he did me. I told him I take dating slow & discussed our religious differences given he talked about being Mormon (I’m a former Mormon). He mentioned feelings of guilt for drinking alcohol with me on the 1st date & that he makes dumb choices around beautiful girls.

Following Friday - He showed up with a date even though I had inquiried when he’d be there. He had told me on our 1st date I was the only girl he had brought. I was caught off guard, stayed by my friends, & flirted with other guys.

Later via text he said he didn't know I had wanted to meet up at karaoke and should have been more clear.

Following Friday - He invited me to join him at karaoke but withdrew that request because I was bringing my niece who loves to sing (planned before he asked). He didn't like the idea of entertaining a teen yet I didn't ask him to. I brought her with my friends, flirted with guys, he stayed across the room but did bump into me giving a compliment on my looks.

Date 3 scheduled via text - Day of requested a raincheck due to a busy schedule. Our texting reduced after that.

After a week, I scheduled a hang out- I reach out about plans at 2pm but he said it'll need to be much later because he didn't get sleep from having a panic attack. At 9pm I called to see if he was okay & left a message. I received the text at 11:35 am the next day(Monday):"LOL meds made me sleep 14 hrs". After 10 hours I reply joking he was flaky. He responded he didn’t care if people see him as flaky then called me flaky for taking 10 hrs to respond. I requested we chat via phone call explaining it was miscommunication but he didn't respond.

Hang out (Wednesday)- He texted requesting I say "hi" at an event he was doing. I dropped by, he was very flirty and mentioned he'd have kids with me if I wanted them if we ever get married. I'm used to hearing people in Utah talk about that stuff too early. I asked him questions but he didn't ask me questions.

Friday - I missed a call from him. He was going to karaoke again, I was camping.

Our texting further reduces so I initiate but he often wouldn't respond. Meanwhile, he'd blow up my FB newsfeed with posts/comments(he added me the day we met before asking me on a date).

I reached out via text about things going on in society to show some of MY interests but he informed me he won't read things beyond 5 words & I was a bit much (despite him having texted me in the beginning with texts longer than 5 words). It did offend me but I kept that to myself.

He asked me on our 3rd date a week after spending time at Wednesday night karaoke.

Date 3 (Wednesday) - I asked him questions, he didn't ask me questions. He mentioned during this date AGAIN that he'd have a kid with me if we got married & he'd want the kid to attend church but also contradicted himself by saying "if you were Mormon, I'd be all over you". I told him I’d never believe in Mormonism.I joked about his no longer than 5 words message and he informed me to send him a Marco Polo because he'd actually listen to those.

Following day/week - I initiated convos via Marco Polo & only got 1 response from the 1st video. I asked a question in the next video but heard nothing.

Friday night - I went to karaoke with my niece & friends. He showed up, saw me, and sent a text "hello there". Didn't come over to say "hi", and even sat in a different spot with his back facing towards me. I didn't approach him but I tested the waters and said "I'm having a hard day". No response whatsoever.

2 days go by, I'm confused & frustrated because being ignored hurts. I unfriended him from FB so I didn't feel tempted to see him interact with everyone but me.

I removed him from Marco Polo & deleted his # so I don't initiate contact.

It's now 4 days since. I would have been ok if he said he lost interest or if the religious differences were the deal breaker. I'm left in the dark & it's frustrating. I'm just giving him space & my life is not on hold plus its been a weird dynamic.

I have a few questions:

-What would prompt a guy (especially in their 50s) to send mixed signals and behave in such a way?
-How do I proceed given he pretty much hosts all the events in this town so -I'm bound to run into him? I'm not giving up my love of karaoke.
-If he asks why I unfriended him or don't message, what is the best way to respond (or not)?
-What should I have done differently?
-Am I overreacting? (I actually think it’s too soon for social media connections)
-Am I cheating myself being open to a friendship?

Thank you!