Am I overthinking this?

My sister was in a relationship with someone for about 8 years. They ended things about 2 years ago, but there is no bad blood. Her ex bf was definitely family to me & the rest of my relatives. However, ever since they broke up we never speak anymore, although I still have him as a friend on Instagram. It’s so weird for me because it’s like I’ve lost a brother.

The other night I had a dream about him (it wasn’t a bad dream), I just figured he was on my mind, so today I decided to reach out. The conversation went sort of weird as you can see. The last thing I said was he could hit me up sometime (I was thinking like keep in touch), but as you can see he never said anything after that (& he read the message & didn’t say anything), which now makes me regret ever reaching out to him in the first place. Do you think anything I said freaked him out? Or am I just overthinking this?