Well, lots of people have at least one friend that they tell lots of things, including who they like. So you can easily fool that friend with this April fools joke, by letting them think you like somebody you really wouldn't.
This is my first instructable.
Step 1: Pick your newfound "love"
Well for this step, all you have to do is choose a person that you and your friend could NEVER see each other liking, but you shouldn't make it too obvious( for example, that kid who always picks his nose and everybody knows is disgusting.)But you should maybe pick somebody you kind of know, or a friend that will certainly remain a friend. Also, you have to make sure your friend will be shocked by your choice of person. It has to be somewhere in the middle.