The key to writing your scene is first thinking about what the main action of the scene should be. Normally this means starting with some sort of conflict and ending up with a resolution. Since you need five characters, you want to choose a plot that might accommodate them all.
For example, you could use a typical star-crossed lover plot:
Lover 1: Wants to marry Lover 2
Lover 2: Wants to marry Lover 1
Mother 1: approves of marriage
Father 1: disapproves
Single Parent 2: disapproves
Next you would choose a reason for the opposition to the marriage. The young lovers might be from different racial, ethnic, or religious backgrounds, or perhaps they are gay and their families uncomfortable with gay marriage. Another possibility might be that one is a drug addict or otherwise a bad choice and the parents are right to oppose the relationship.
The scene would start with dialogue expressing the conflict, and then you might create some sort of event that leads to a resolution, either with the characters and parents all agreeing to the marriage or deciding to call it off. With this sort of scene, it would be easy to portray love and anger.
If you are writing a play for five characters and they will have at least two lines apiece, I am thinking your play will be relatively short. In just one scene, you can create interesting characters and develop a conflict and resolution that will leave your audience entertained.
You stated there must be strong emotions and this will come as you introduce the conflict your characters will deal with as well as the events that will lead to a resolution.
You mentioned that this play was for your drama class. Personally, in this case, I would advise you to leave your audience with some sort of purpose or lesson they can ponder long after your play is over.
Here is an idea, which comes from a real experience with my daughter when she was in high school.
Play: Smoking in the Bathroom
Characters: High School Principal, Student, friend1, friend 2, parent
Setting: High School bathroom and Principal’s Office
Brief Overview of Play: Megan, a senior in high school, along with two friends, is caught smoking in the girl’s bathroom. Although they are not caught with cigarettes, the scene indicates smoke billowing out of the bathroom stalls and the door when it is opened. Megan’s two friends, being escorted to the Principal’s office, vehemently deny smoking and demand to be let go and return to class. Megan, on the other hand, admits to the offence and sits in the office until a parent is called. She is expelled from school for three days. Her mother arrives and is initially upset that Megan has been expelled from school for telling the truth. In the end, Megan and her mother have no choice but to accept the expulsion.
Strong Emotions: The behavior of the two friends as they are denying the accusations of smoking in the bathroom and the emotions of the parents as they struggle to understand how a student can receive such a severe punishment for telling the truth are good examples of strong examples.
Conflict: Disparity between telling the truth and getting into trouble and lying and not getting into trouble
Resolution: It’s better to tell the truth and pay the consequences than to lie and learn nothing from a valuable life lesson.
FYI: You can use one side of the stage as the bathroom and the other side for the Principals office. The transition will work nicely. Good luck!