Sharing Our Innermost Thoughts

I want to put this out there , advice me!
Some Back Story
So , I met a guy in grade 10 in an online class(that class had people from around the world) , he was living in Abu Dhabi , and I was in another country in SEA . He then reached out to me , saying “Hi”. We then talked for a week and had conversations on the respective countries we live in , like really general topics. Then I had left the class , and the last text we interchanged was just saying that we got a CGPA 10 in that grade.
During that conversation , he kept me engaged , really my type.
Fast forward to completion of Grade 12 , remember 0 interaction in that span of 3 years. I finally get instagram , I weirdly remember him , and then add him. After judging him from his profile , etc , he seemed like my type and I can say , I was really into him . After following him , the only interaction we had was liking each others posts and seeing each others story.
Now , Fastforward to 2021 , we both are in first year of Uni (he is in canada , me in uk). And recently , he wished me a Happy Birthday , with MY NAME (REMEMBER , SUDDENLY , After no interaction for 3 years , I was actually shocked seeing the dm ) , He sees all my stories (after understanding the instagram story view chronology , he is always on the top) .
Basically , I like him alot , I feel like he likes me back , I dont know how to go about this.
I am really focussed on making my career , at the same time I want to let him know that I have feelings for him. What if I miss that opportunity , and goes with someone else , I will regret.
At the same time , I am scared to let him know about it.