Honestly this is tricky, as each person loves in their own way, and expresses that love in their own way, though the first thing you have to do is know and love yourself. For me, I am always there for her, and drop whatever I'm doing when she needs me. If she sends me a text, I drop whatever I'm doing and reply to it. She's the first person I text in the morning, and the last one at night. I buy her nice things and take her to romantics places. Sometimes, I just sit with her and cuddle without even saying a word. There's a lot of other stuff I do, but like I said each person does it their own way.
Be a man
To love a woman you have to first thank cupid for sending her your way. Appreciation is the beginning of love. Cheers and Merry Christmas!
... see and appreciate her for who she is, not the fantasy you want her to be.
Same goes for loving men too I'd guess.