I cried infont of a potential crush. Did I ruin my chances?

Ok, here it goes. I'm a senior, so is he. We've only been in school a few weeks, and I just noticed him a week or 2 ago. I wouldn't consider him a "crush" yet because I don't know him well enough, but I definitely think he's attractive, mysterious, intriguing..and he seems pretty nice. And we sit by eachother 6th hour. But I wanted to get to know him better.
So far I had been doing a good job. I've been talking to him a little bit each day, because he seems like a quiet guy and I want him to know who I am and know that I'm friendly. Today when I got to class, he actually started the conversation this time - awesome right? Except I had been having the worst day today. I had already cried once. I'm typically upbeat and funny, but occasionally I get very emotional and anxious.
Nevertheless I started off the hour with him in a decent mood.. I was happy that he was talking to me, being silly and making me laugh. Then I asked him what he wrote as an answer to one of the questions on the worksheet we were doing. He jokingly teased me, asking if I had even read the passage. That's when I went back to the sensitive, insecure, anxious version of myself that I was earlier that day. I got kinda defensive and said "uhh sorry" sort of shyly and backed off. He just laughed it off though and started giving me the answer. I froze up and then he playfully teased me again and asked why I wasn't writing anything. He was grinning the whole time, obviously not trying to cause any harm, being nice. I was just having a bad day and being a baby.
I started to silently cry in my seat, because for some reason I felt really dumb and insecure. and I fear that he noticed. The last thing I wanted was to cause a scene, so I got up and asked the teacher if I could go to the bathroom, where I wiped up my tears. I came back and as I walked back to my seat he sorta watched me, so yeah I think he noticed that something was not right with me. I feel bad that he had to witness such a bad side of me when he hardly knows me. I fear that he won't want to talk to me know. Like, he was being all cute and nice, and I just had to blow it and act super weird. Not to mention he's a quiet guy and what if he won't want to put in the effort to try and talk to me again? I feel so dumb and embarrassed. He also didn't ask if I was okay, does this mean there's a chance he didn't notice? Or did he just decide it wasn't his place to ask since he doesn't know me too well? Or did he not care?
I also don't know what to do next time I see him in class. I really do still want to be friends with him. I know I'm probably overthinking this - I tend to do that. Buuut yeah. Do I act super nice and approach him and pretend like nothing happened? Or do I started with a "hey, sorry about yesterday?" Or do I let him approach me? Whah do I do? Ugh..