seems to be diseased,we have two trees. don't want whatever is wrong with the one to spread . sap is seeping needles are small and not as full as the other tree trees are at least 100 ft
Anoka County Minnesota
Does this sound like what is going on with your pine? http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/white-pine-blister-rust/
If not, if you could upload a photo that would be very helpful.