To be familiar with someone.
to know somebody
To introduce yourself to someone for the first time.
meet someone
To share a lot of the same interests with someone.
have a lot in common
To talk about something to someone.
discuss something with somebody
To ask someone to marry you.
propose
To stop being in a relationship with someone.
break up / split up
To keep in contact with someone.
keep in touch with
To call or text someone.
get in touch with
To have a good relationship with someone.
get on well
To become familiar with someone.
get to know
To speak angrily to someone, telling them that you disagree with them.
argue with someone
To stop having contact with someone.
lose touch with
Someone who works with you.
colleague