I've been having issues with getting really bored during this summer vacation.
Yea being bored is a horrid psychological state to have, boredom is horrible to experience
It can get really bad sometimes but otherwise it is just mildly irritating.
There is actually no universally excepted definition for boredom
That's really weird, it seems like it would be pretty easy to define boredom.
Yea hut it is different from apathy or depression
Depression is so much different to boredom, since one is not that temporary. 
Yea depression is quite bad compared to boredom, its not another name for boredom at all