Search Results: how to get her back for good

I'm not sure if this guy in class likes me back so maybe you can help me figure it out.

A few things to keep in mind

• We sit next to each other, so a lot of what I see is from my peripheral
• We're 17, (I know It says otherwise I thought you had to be 18 and over to sign up so I made it older than I was)
• There was this one time when we were playing trivia in class and I was 1 point ahead of him and I think he was flirting/making banter because he basically said "I'll pay you to lose" or something like that but then after he said that he kept looking at me then down then back up at me and at one point he gazed into my eyes for like a good 5 seconds and I was kinda taken aback and made me a bit nervous.
• Another time we were doing a video project that required us to ask some of our classmates for help so basically he was going around the room asking everyone up else for help filming his video and every time he would sit back down at his desk he would look at me and when I would look at him he would look back at his laptop. When he did finally ask me he seemed a bit red in the face but it was kind of hot in the classroom so it could have been that.
• Sometimes my teacher likes to sit in the same row as us and grade work, so naturally I would ask her questions and when I would he would look at me while I was talking but I only would he look at me he would sort of guess into my eyes sort of dreamy like, (which I think is unnecessary like why are you looking at me right now focus on your work) but anyway

But at the same time I don't think that he likes me that way because sometimes when I talk to him he won't look at me directly : (

If he does like me back what should I do? Should I write him a letter? Should I try to talk to him more, I'm kinda playing hard to get right now.

Sorry for the long read, thanks for any help in advance!

We’re currently in a dating app era & the idea behind dating apps seems practical yet you hear more bad than good things about them. Almost 30 & I’ve never been in a LTR, I have accomplished everything I currently want out of life but been able to find a quality guy. I’ve owned a condo & strive to eventually own a home in a few years, are dating apps to blame behind being single or is there more to it (aka am I the issue)? I’ve been told I’m attractive by all kinds of people for a good chunk of my life but I’ve never been approached in person by a guy I’d like to date (getting checked out doesn’t count).
The only times guys I find attractive have acknowledged me were on dating apps, it’s just there’s times where maybe I feel burnt out & can’t be bothered to end up meeting that guy in person.

Or when I feel like I have *options*/ I’m in a mood where I just don’t want to put in the effort. And when the app outlook looks dismal at a given moment (like now), I consider deleting & reinstalling at a later time. I get bored after communicating too long etc, it may seem like self sabotage topped with my terrible anxiety but I’ve never felt SO unsure about something in my life & that *something* is dating. Unsure if my lack of libido/lack of interest in being sexual might play a part (no health issues). There’s always that voice in the back of my mind that makes me think the right guy will change all of that but who really knows. I’m worried I’ll be shriveled up & when I finally have that drive, it’ll be too late to find a match. I heard an influencer say the other day that there shouldn’t be pressure or a rush to date, it’s an opportunity that’ll always be available.

TL; DR: Is dating hard for most? And is my case bad luck or someone unsure of what she wants?