There are a lot of ways to indicate affection.
The - is he into me - game is pointless. It takes too long and you might never find out. Here's also another tibbit about guys. They're never into you, but they're always into you.
To guys, every female is a potential fuck buddy. If you're attractive, then you should have no problem. If they give no indication, it means that they're not thinking of that at the moment, but that's fine. If you show them that you're open to it, they will bite. So, even if they're not into you, it's easy to make them be into you. It's always a possibility at the back of their mind.
You need to take some steps, out of what you already do with everyone else. Usually go to the cinema? Go somewhere else distinctly romantic.
Plan a special event, invite him to a party, as a date. There's no need for any dramatic confession, just keep on dating the guy until you become a couple.