Have a tendency to exaggerate / lose his/her temper / make snap (quick) decisions

Check out a museum
To "check out a museum" means to visit a museum together.

Celebrate an anniversary
An "anniversary" is the day and month that is the exact day and month of a special event, such as the day two people got married. So to "celebrate an anniversary" means to do something special because it is an anniversary, such as to eat a meal at a special restaurant.

To have a fling
To "have a fling" means to have a short, intense relationship with someone.

To ask someone out
To "ask someone out" means to ask them if they want to go out on a date with you.

Go out
To "go out" means to go out on a date with someone that you are romantically interested in.

Date
To "date" means to go somewhere with someone you are attracted to in order to spend time together.

Hang out
To "hang out" means to spend time with someone, either in a public place or at home.

Get together
To "get together" means to spend time with someone doing an activity or eating a meal.

Get to know
To "get to know" someone means to spend time with them in order to learn about them.

Get along
To "get along" with someone means that you both enjoy spending time in each other's company.