I think i have found i crush in btech 1st year : i need a advice

There is a boy in G1 I , he always sits on the corner side of our classroom. He has a cute dimple on his cheeks when he smiles. Actually he smiles and laughs a lot.

I saw him a few days ago , in a physics lab, doing an experiment, taking instructions from sir, coordinating with his exp partners. My heart stopped for a moment, i also felt jealous. I forgot my experiment at that time.

But the major problem with him is, that he is not very regular to college. How to start talking with him? I am a shy one. I have his watsapp number, but i don't want to start messaging him directly.

Tell me guys, what should i do ???????