<human>: Can you provide a brief rundown of the text in within 3 sentences?

Okay, so basically here's what's up: my bf and I were supposed to hang out tonight to fulfill a bet we had made a couple weeks ago and that I lost (the best was something sexual).  We were supposed to last night, but he said he was nervous and wanted to postpone.  
Here's the text convo, starting with him:
"Let's just not d my bet. I think I'm going to go to sleep soon."
"Is it me?"
"Not really sure.  I need a night to think."
"About the bet or what?"
"About something.  I don't want to talk about it."

So basically I'm here freaking out because I thought he just didn't want to do the bet, but now it seems like there's something else?
I know it's hard to determine what he might be thinking if you don't know him, me, or our relationship.  So if you need to know more just ask in a comment.  But any advice/help would be much appreciated cause I'm worried now.
<bot>: bf says he needs to think and he's "not sure if it's me"..should I be worried?