lovestruck

Like struck with a lightening bolt. The second that you see and meet the person, you are instantly in love. Head over heels, can't stop thinking about them, want to be with them, hold them hug them, & be held and hugged and loved by them in return.

In love bad and suddenly.

(adj.)
Struck with an intensity of love.
Struck so hard, that you can't bear to be without your other half.
You can't keep your mind off of him/her. And without them, you'll die.

Unforeseen, love blinds you in a moment like an epiphany overwhelms a scientist. Whether you have known this person for a lifetime or a second, you are struck with the realization that you are hopelessly in love with them. Some might call you a simp; others might say you're down bad. Just make sure that it isn't a superficial love before you give your heart away. Fall in love with their heart, and keep that lovestruck kind of love alive.

Taken in love by a person or thing.

Wanting something so bad that you are willing to give your life to have it. Cause it’s all you think about. Or you think you will die without it

Lovestruck means when somebody likes someone but they've already been rejected from them, or they don't like them back, but still likes/loves them no matter what