Have you noticed... How many replies from people you gotten and taken interest in you now? See, you're not dull... Otherwise we all wouldn't be here.
You don't have the same interest as they, or as I've discovered there are 'closet nerds', they simply can't allow themselves to be 'open' in open public about the same interests as you.

Give them a shot at conversational topics, if you really want to be friends with them. You only care about being with them because... well, it's 'new'. Perhaps you'll see things from a different point of view.

Instead of outside looking in, you want to inside looking out... Just don't leave your friend standing alone outside looking in.