I can't really help you with any easy tips. I have the same issues with writing emotionally and I was never any good at poetry.
I still don't really do it well but, the only thing I can say is, I found it easier to write lyrics when I stopped censoring myself and stopped worrying about being embarrassed. I did this by giving the words to the character of "singer of the song". It was not me singing but person in the song.
I hope that makes some sense.
Also, be honest. Don't try and make your feelings universal. Make them personal. I have only really done it once. My song " Fool in Love". If you listen to the last line you can here my voice cracking with the emotion.
http://www.jamendo.com/en/track/665883Finally, I add a quote from one of the best songwriters ever....
"You could write a song about some kind of emotional problem you are having, but it would not be a good
song, in my eyes, until it went through a period of sensitivity to a moment of clarity. Without that
moment of clarity to contribute to the song, it's just complaining" (Joni Mitchell)
Mihkay