people from the pind are usually related. Even if they dont share surnames. They could be your great great grandfathers daughters kids who moved to this pind because their dad died.
Anyways. You are only 20. Do you want to get married soon? If not stop talking to guys.
Everyone knows first love never lasts. And if you are going the western way in ur relationships. First heartbreak is also a milestone. Wallow in it, cry for a few days. Enjoy the melancholy.
Dont antagonize ur parents, ur future, ur education for this guy.
Western societies believe love is amazing and special. Its not. People fall in love multiple times, even marry and promise love till death and then divorce and then find another love to marry.
Any guy you start talking to and share 'dukh sukh' u will become emotionally attached and be in love with. So forget this guy, you will find another one.
And hopefully, like alot of indian girls, remember to see if the guy is suitable before deciding to fall in love or getting involved. Which usually includes finding his caste, surname, nanake pind, income level, any enemities with ur family ? just a heads up