This is a Common Thing That is Asked About With Facebook Here is a Short Tutorial
Yes it May Be Possible
If you Have Used a Profile Picture in the Past
Go to the Profile Pictures Photo Album Than Go to the Picture
Than Under Options Choose Set as Profile Picture
What if the Picture is Not In That Album ?
Than its Not Possible to Change your Picture And Keep the Same Likes and Comments
Why is that The Only Possible Way to Do It ?
Because Facebook Designed it That Way its Not Set up To Transfer Likes and Comments
Over Of Any Other Way But the Way that i had Mentioned
Facebook Never Likes to Make Things Easy
What if i Transfer the Picture to a New Album Would That Keep the Same Likes and Comments ?
No It Would Not If you Did That you Would Notice That All of the Likes and Comments Would Not Show up in the New Album That the Picture is in