Personally, as long as you're taller and weigh more than me (with a good personality and all the jazz) I wouldn't avoid you. Just don't be bony, it hurts.
I guess that all depends on how vain people really are. Personally, I would. I guess it matters on what you bring to the table, personality, smarts, an outgoing fun person. NOT someone who just wants to talk S@#T to a girl and try to get in her pants. That's just me!
Good lord, for a moment there I thought you meant 72 pounds! Then I realized you're surely talking kilograms, right? 72 pounds would be roughly 33 kilos, which would not only be unhealthy but truly frightening for a guy of your height! But judging as you're from India, kilograms would make more sense.
Anyway, 72 kilos at your height isn't bad at all. That's about what my brother weighs, maybe you're a shade under his weight, but he's your same height. And he's quite the ladies' man. I like skinny guys. As long as he's not so skinny to the point that I'm afraid I'm going to break him, of course! ;P
Dude, that's like around 144 lbs. Man, you need to get in the gym and gain some weight. How are you going to protect your girl and intimidate all those other guys? You have to look strong and mighty, you can't be looking like a bag of bones.