Search Results: getting shy around him

I met a rather shy seeming guy online. After several months of talking we finally met and I thought the date went quite well. We went to dinner, stayed talking for a while after dinner, and then and walk around downtown.
He began to talk to me much more and was blowing my phone up, but didn't mention meeting up again for about a week and a half. Since it took so long the first time he askd me out, I asked him if he was free the following weekend thinking it may take the pressure off and might be easier due to his shyness. He told me he would have to get back to me once he saw what his plans were. I waited a week and he didn't mention it again. I let him know since I didn't hear back from him let's just plan something for the next weekend since I was feeling sick (stomach bug). He said that sounded good and same thing nothing mentioned for a week.
I asked him what he was planning on as I needed to know so I could plan. He told me he had something come up and he was busy (he's quite active on social media so he's got time for that). I told him as it seemed we were having issues with getting together to let me know when he was free and we could work something out. Since then he hasn't replied to any texts (we texted daily for two months and I just asked him how his day was going) in about four days. I'm just confused as to why he would act like he was interested and wanted to see me, but has gone MIA?