Dun give up TS bro... I know it's cliche', but there will be other chances...

I used to be in a similar position too, I gave my all to an intern girl, we got really close, but I was nvr the one in her heart. Now even after chasing a number of other girls, there was never gonna be another like her.

But it's no use to chase a person if she doesn't feel the same. Like another fella posted, better to be friends than to have her hate you. All the best bro, keep your chin high and never give up...