They want to spend time with you, even when you're not giving them something.
They listen to your troubles, even when you've told them again for the umpteenth time.
They shut off their cell phones around you.
They invite you to parties with their other friends, even though you don't like parties, and may not like their other friends either.
They stand up for you, no matter who it is that they're standing up to.
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.