Back rubs/massages.

French Kiss.

Whisper to each other.

Skinny dip.

Hold hands.

Buy gifts for each other.

Roses.

Find out their favorite cologne/perfume and wear it every time you're together.

Kiss at every chance you get.

Lightly kiss their collarbone and their jawbone just below the ear, then whisper I
        love you.

Hugs are the universal medicine.

Say I love you, only when you mean it and make sure they know you mean it.

Give random gifts of flowers/candy/poetry etc.

Tell her that she's the only girl you ever want. Don't lie.

Spend every second possible together.

Tell her that she doesn't have to do anything she doesn't want to. And mean it.

Look into each other's eyes.

Very lightly push up her chin, look into her eyes, tell her you love her, and kiss her
        lightly.

When in public, only flirt w/ each other.

Put love notes in their pockets when they aren't looking.

Buy her a ring.

PDA = Public Display of Affection.

Take advantage of any time alone together.

Tell her about how you answered every question in math with her name.

Let her sit on your lap.

Lips were made for kissing. So were eyes, and fingers, and cheeks, and
        collarbones, and hands, and ears.

Always hold her around her hips/sides.

Hold her hand, stare into her eyes, kiss her hand and then put it over your heart.

Unless you can feel their hear beating, you aren't close enough.

Do cute things like write I love you in a note so that they have to look in a mirror
        to read it.

Break every one of your parent's relationship rules for them.

Make excuses to call them every 5 minutes.

Even if you are really busy doing something, go out of your way to call and say I
        love you.

Call from your vacation spot to tell them you were thinking about them.

Ride your bike 8 miles just to see them for a few hours.

Ride home and call them.

Tell each other your most sacred secrets/fears.

Brush her hair out of her face for her.

Hang out with his/her friends.

Learn from each other and don't make the same mistake twice.

Everyone deserves a second chance.

Make sacrifices for each other.

Really love each other, or don't stay together.

Let there never be a second during any given day that you aren't thinking about
        them, and make sure they know it.

Love yourself before you love anyone else.

Dedicate songs to them on the radio.

Fall asleep on the phone with each other.

Stand up for them when someone talks trash.