I keep overthinking and it’s driving me crazy. 

I met a guy online and we’ve talked all week, we finally met up yesterday and things went well. They seemed to go well. Maybe only I think they went well. Maybe it didn’t go well. I have no reason to think that they didn’t. 

But he didn’t message me that night (logic: he was super tired from jet lag, probably went to sleep shortly after leaving). 
I messaged him this morning and it says it was read but he didn’t reply. (Logic: it’s first day back to work post travelling for both of us, I don’t always respond back on my lunch break. Hell, I usually don’t respond back on my lunch break, why do I expect everyone else to?). We’ve also been texting on an app instead of our phones because we were both out of country, he also always has taken a bit to respond. 

So now I’m thinking of every way I could have fucked things up, all because I’m worried that he hasn’t responded to a message. 

And now my brain is stuck on repeat, I’m trying to work (I’m a nanny currently, kids are asleep hence being on reddit) but my brain keeps going back to this. 

I want to not feel instantly attached to a new person, I’m really trying because I like the guy and I was a shot at a healthy relationship. I don’t want to become attached and ruin something before it even happens...again. 
Can’t the BPD just go away and let me be...I want to know what it’s like to build a healthy relationship and not have your brain become obsessive and attached so quickly. I’m setting myself up to be hurt, and I hate it.