When you are very attracted to someone but you are not in a relationship with them. They often do not know your feelings for them.
To have a crush on someone.
When the person looks nice and friendly.
cute
To do any physical act, such as hugging or kissing, holding hands and etc.
To be affectionate
To spend time with someone, either in a public place or at home.
to hang out
To eat a quick and casual meal together.
to grab a bite to eat
A relationship between two people, one or both of whom are married to someone else.
An affair.
When people have a nice way of acting and people enjoy being with them.
charming
To kiss someone intimately on the mouth with tongues touching.
To make out (a French kiss).
Someone who pays too much attention to someone who is not interested in them and makes that person feel uncomfortable or unsafe. Often they follow their person of interest.
A stalker
to end your romantic relationship with people
split up(break up)
When you develop instant and extreme feelings of love for someone upon meeting them for the first times.
Love at first sight.
Someone who is nice and kind. Sometimes to an annoying degree.
sweet
To hold someone close to your body in order to show affection. A synonym to hugging.
to cuddle
To spend time with them in order to learn more about someone.
To get to know someone.
To get married.
to tie the knot
To begin to have romantic feelings for someone.
To fall for someone.
A more formal word used to describe a man or a woman who is very, very good looking.
gorgeous
To be cosy with someone, being close, hugging each other and etc. Often done under a blanket.
to snuggle
To have romantic feelings for someone but they do not have romantic feelings for you.
unrequited love
To act as if you are not interested in someone so that they will try harder to get you to be interested in them.
To play hard to get/play it cool.
When people get along well together, often because their interests or personalities are similar or complement each other.
To be compatible.
When people think about the needs to other people and then try to meet those needs. They show consideration for the needs of other people.
thoughtful
To give someone a small kiss on the cheek instead of the mouth.
To give someone a peck on the cheek.
To tell two people that they should date each other or to help two people get a date with one another.
to set people up
When each person pays for their own activities and food on a date.
To go dutch on somebody. (A Dutch treat)