While it seems likely to me that there is other intelligent life in the universe, it seems unlikely that we'd ever meet them.
They'd be on a planet circling a star that's many light years away from us. (The two dozen stars closest to us are from 4 to 12 light-years away). We've only been creating radiowaves for 100 years or so, so they'd have to be within 100 light years to even know we exist. That's a pretty small circle, universe-wise. Reduce that circle further to allow them time to come visit us after realizing we're here.
Then they'd have to have the means and desire to visit us, while at the same time NOT having the means or desire to contact us thru speed-of-light methods such as radio or laser.
Of course, maybe they don't live on a planet at all. Maybe they developed in the vacuum of space. Maybe there are bazillions of them throughout the galaxy and they couldn't help but bump into us. Maybe they've been trying to communicate and we haven't been listening correctly. Lots of maybe's, lots of possibilities.
It seems unlikely to me, but impossible to rule out.
Dave