Why am I so depressed?

ever since got holiday away in tenerife have been feeling depressed. there 2 weeks , felt home, ever since i've been when ever i've known oing on holiday or seeing plane landing or taking off(because can see planes landing , taking off bedroom window) keep on being depressed.
please help

ever since got holiday away in tenerife have been feeling depressed. there 2 weeks , felt home, ever since i've been when ever i've known oing on holiday or seeing plane landing or taking off(because can see planes landing , taking off...

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