[Focus Is Art]

I am running out of idea and need some help from you.

Since about 2yrs ago I have non stop problem with the Passenger side head light.
first light go out, great new bulb in.
a month later, light out again and socket melt. Great, new socket and bulb.
about 2 month later light out again but both the socket and the bulb are in good sharp. I have been driving with only one head light for about a month, suddenly the light come back up.
That's the story the last 2 yrs, light out, socket melt, light suddenly come back and die again...
...
I checked wire, fuse and everything in between but nothing wrong. If I turn on high beam it will dime.

Any help would be great.