"You meet a person. They’re attractive. You have great chemistry. You become infatuated with them. You love the intimacy, the flirting, the sexual relations, the butterflies, and the warm feelings you get from being cutesy-coupley together.But take that all away.
If you’re left with a person who you genuinely enjoy spending time with as a friend, someone you admire and respect as an individual, and you are completely addicted to this person’s presence, then that’s the person you should spend the rest of your life with."
Everytime Big Bang Theory