Got into a relationship but things are moving too fast and i dont feel like continuing it

So basically, we've been friends for a little over a month, more like online friends. We’re both from the same city and go to the same coaching centre, just different branches in Delhi. We also live on opposite ends of the city.

It all started with us motivating each other to study for JEE. Slowly, he started getting flirtatious with me. I guess he started liking me. I didn’t really mind it. I mean, he’s a 16-year-old guy talking to a girl every day — it was kind of bound to happen. At first, I didn’t flirt back because I didn’t like him that way. But eventually, I started liking him too, and we both started flirting. Then a couple of days later, he asked me last night if I’d want to date him. I said yes, since I had already started liking him. So yeah, we got together last night.

Now that we’re dating, I felt like the least I could expect was to be able to talk on calls. It was something he initially found difficult, but we sorted it out and he agreed. I also asked if there was any chance we could meet in real life, and he said maybe after JEE. We’re both in 11th, so I get it. It’s not easy to take out time to meet during prep.

It’s been just 14 hours since we got together and honestly, I’m not complaining. He’s a nice guy. He treats me well and says the sweetest things. I really like him. But at the same time, something inside just doesn’t feel right. I feel weird hiding this from my mom. I’m really close to her and it feels like I’m doing something wrong or breaking her trust.

I also started to feel like he’s moving really fast. Like last night, we had just gotten together and he already texted “I wanna cuddle with you to sleep.” Dude, we’d been dating for like 15 minutes. And then today he said, “I’m gonna go take a shower,” and when I said okay, he replied, “You’re not excited for the shower?” I know he meant it as a joke, but still, isn’t that a bit too much too soon?

Maybe I’m just overthinking, but I don’t think I can be with him. I don’t think I like him as much as he likes me. And I know this makes me seem like a bitch, but I swear I have no bad intentions. He’s a genuinely good person and I don’t want to hurt him. I just don’t think I’m mentally ready for a relationship. I might be wrong, I don’t know. But ever since we got together, it’s been draining all my energy and I just don’t think I can do this.

Should I tell him how I feel before he gets too attached?

tldr; me n a guy got together n he was just too much for me im not sure if i want to continue with him ;-;