When you say

When you say you want me

Do you think of her

And how much you wanted her?

When you say you I make you happy

Do you think of her

And how she made you happy?

When you say I’m yours

Do you think of her

And how she was previously yours?

When you say you love me

Do you think of her

And how much you loved her?

And maybe its

Not past tense at all