My Ex (M27) is scared of seeing me (F25) in public

We broke up almost 5 years ago, we used to live 5 minutes away from eachother. I live with my brother, who is best friends with my ex.

My ex occasionally drives by every few months I’d say, “just to check in on the area” as he’d say. Well, I’d just gotten home from work one night last week with some flowers. My ex drove by me accidentally and saw me with my flowers, unloading my car. He texted my brother saying “I was in the area and saw ur sister. Thankfully she didn’t see me. Does she have a new admirer? Ooohhh??”

The last time I talked to him was in February, my communication with him has been every like 6 months since breaking up. It was me contacting him almost every time. We hung out one night after I got off work, got Starbucks and went to dinner. Shopped around where we’d frequent previously. He at one point poked my back like before while we were walking. It felt like old times. I was looking at flowers, and he wanted to know how much they were, I was thinking he was going to buy them for me, but he didn’t. He wanted to pay for dinner since I paid for Starbucks, but I insisted 50/50. After all of that, I drove him home and….we kind of hooked up. After a few days passed, I’d gotten him to spill on his emotions, and he said he doesn’t think we’d work out. He said at one point in time he really wanted to try again with me, but that was then, and he doesn’t want to now. After February though, I made a promise to myself to never reach out to him again.

I agreed to be friends with him after he said “I’ll message you in like 30 days, I need to get away from this town and I need time to think” I’m not sure of what he had to think about, I was hoping he’d changed his mind. But I made a promise to myself that I’d never reach out to him ever again, and I blocked him on Facebook. I haven’t blocked anything else.

Shortly after his drive by my house, like a few days later he spotted a car similar to mine at the library I frequent, and he took a pic of it and sent it to my brother, asking if I was there. He was hesitant to go in.

So why would he ask my brother that when he’s moved on and doesn’t want anything to do with me? That he’s scared of seeing me in public?

He’s driven by my house with his friends at one point as well, to show them where me and my brother live. He’s even told me that he’s showed my friends where I use to live previously. He’d always tell me randomly, “I went to target at like 10am, I was afraid I’d see you”, or “I went to Barnes and noble the other day”, and “I was at Burlington coat factory with my friend the other day”.

I just don’t get why he’d tell me these things?

Tldr; why is my ex asking my brother if I have a new admirer and driving by my house occasionally when he’s moved on and doesn’t want to see me?