What is up with him?

Recently I started noticing a lot of his actions and how he is around me, whenever I start talking to him lately. We had a special friend of ours passed away not too long ago. And it was his mom... my mom and his were best friends and they had a special relationship. So it was devastating for me and everyone else. During the funeral, when he had to give a speech he look at me the whole time. Especially when he started crying a bit, I even cried along... After the funeral, he asked if I were able to come over and hang out a bit so I said I would try. When we started driving, for the first time I felt like something was up and not because of what happened to his mom. Something told me in my gut, that there is more to the story and I didn’t know about it. When we went home my little sister who is only 9 came to my room and told me something happened during the funeral. She said that when I was heading towards the restroom he walk a few step to see where I was heading and he accidentally bumped into someone and he started blushing out of nowhere. And then she finally tells me this! That around last year whenever I was on my headphones and doing homework like always. He would usually go to the living room and be on his phone. I always thought he was addicted to his phone at first. Till she said that she started noticing him texting but he only texting to himself? Not only that he would also try to peek a little to see me whenever I am not looking. Me and my family have recently been visiting very often and he tends to hangout with me more often then usual. All the time we talk he always asks about my future and what I want to do. And also, I remember last year when we had a group hangout he asked if I ever wanted kids and I said probably no since I am dreaming of becoming a surgeon. He later said that since he’s wanting to become an engineer he would still make the time for it. I tried to ask what he meant but he avoids it. Even though it was last year he always asks about my future plans. And last week I invited a friend over and we hangout with him and she try to flirt with him( she knows what going on, she is just trying to see how he reacts) by calling him “sweetie” and all. And he didn’t give eye contact or anything but he said he hates being called that. So I teased him and called “sweetheart” and he turned his chair and said, “ okay boo”. And before I were to react, my friend was charging her iPhone along with my emergency charger bar. And she squeals and jumps, whiling holding her phone she almost hits him with my charger bar🤦‍♀️. Therefore, she ruined the mood right away. After he forgives her, he later tells me why I didn’t sign up for the college classes. And I told him I wasn’t confident at first but I hope next year I can sign up till then. And in whisper he says, “why say that? When your smarter than all the other girls”. I said, “ what?”. And he says,”what?”. I told him to repeat what he said but he said never mind 😑. His older sister who is married has been looking at me oddly lately and along with everyone else including his cousin who I am friends with. She later texted me if there was anything going on between me and him and I said no. It’s been getting awkward lately since me and him go to the same school as well. Since I have a feeling he might have a crush on me or maybe everyone and including me is just exaggerating. What do you guys think???🤷‍♀️