but how can i make him laugh? anyway he's straight

Talk to them. Comuuunicaaatioooon. They can't notice you for who you are if they don't see how cool your spirit is first.

First of all, make sure he's gay or bi, or you'll get hurt (true story...) if he's gay or bi, do what Lax said ;) good lucky

Be yourself, be sexy and be funny! the key is to make them laugh! :)