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
Agreed, I have been bored so much and I don't think I've been anywhere close to being depressed.
state that people find unpleasant—a lack of stimulation that leaves them craving relief, with a host of behavioural, medical and social consequences." According to BBC News, boredom "...can be a dangerous and disruptive state of mind that damages your health"; yet research "...suggest[s] that without boredom we couldn't achieve our creative feats." 
In "Experience Without Qualities: Boredom and Modernity", Elizabeth Goodstein traces the modern discourse on boredom through literary, philosophical, and sociological texts to find that
Boredom
In conventional usage, boredom is an emotional and occasionally psychological state experienced when an individual is left without anything in particular to do, is not interested in his or her surroundings, or feels that a day or period is dull or tedious. It is also understood by scholars as a modern phenomenon which has a cultural dimension. "There is no universally accepted definition of boredom. But whatever it is, researchers argue, it is not simply another name for depression or apathy. It seems to be a specific mental