Scenario say a 18 yr old fell in love with a 14 yr old, she already had bf what should the guy do, its for a love story i have to write for composition class

I cannot give you a story as I would like too, it would be plagirism... so I'm going to give you some tips on how to write it. 

1. Use your real life... I think that using adjectives that describe your real life could amp the story up... besides that awesome scenario/main idea you've got here.

2. Describe the story the way you'd like someone too do for you, but don't forget too make it "dangerous" not all lovely-duvvy if you know what I mean.

3. Keep it simple but make the story complex. What I mean is don't overthink it, just type. 

4. Don't make edits as your going through, just type, type, type... when your done you'll see you've written a whole story. Edit afterwards. 

5. This is my top favorite tip to get over writers block, read a book. More specifically a book that's the same topic as what your writing about... romance. Read a romance book for extra inspiration. 

6. Lastly, end it with something provacative. Make it a cliffhanger and have readers craving for more. 

I hope this helps, I personally love writing and have picked up a few tips along the way :)