When you worry that making out too much might make him lose interest in a while.
When you just want to be with that person not all hours of the day but just enough to have a lasting image of him/her before falling asleep at night.
When you're high and instead of going crazy with all the other girls/guys with you, you just wonder when your girlguy is going to turn up and when he does you scream out your feelings for him in front of everyone. Or just feel like.
When you take your phone into the bathroom with you in case he/she calls while you're bathing