'tere liye' song mean something?

So they keep playing the Tere Liye song from Veer Zaara whenever ArVi are together...I wonder if it means something? The male part sings "tere liye, hum hain jiye, hothon ko siye" meaning he is not telling something/keeping his mouth shut...does that mean there is a reason behind Arjun not contacting Purvi in all these years? Or do you think it's just a song b/c they've been seperated for so long?

Arjun is the one singing "honthon ko siye"...hes hiding some secret for 20 yrs!

There might be a reason, but knowing EK, she may show such a silly reason for his keeping quiet

I am assuming that ekta will show that Ovi, got pregnant with the guy who helped her in getting photo shoots, (I don't know his name) in Canada, while she was drinking all the time. And that must be the reason that she had a premature baby. And she must have used Arjun to say that it was his child, but later she must have confessed that it was not his, but Robert, and took a promise from him not to tell any one about herbaby born to a Canada friend. So even purvi was not ready to listen to him at the beginning, and now he is keeping up the promise made to Ovi.