Hmm... I don't know what would musically match Skillet. The best thing I can think of is "
How's It Going To Be" by Third Eye Blind. You might not like my other suggestions, most are pop:
I'll Remember ~Madonna (one of her old ballads)
Time To Say Goodbye ~Sarah Brightman & Andrea Bocelli (this version is in English & Italian, but there's an all-Italian version called Con Te Partiró)
Song For the Lonely ~Cher
Alone ~ST
QZoo does a great song about loneliness called "Let the Light In". You won't find it on YouTube, unfortunately. The lyrics go:
I'm so tired of these lonely Saturday nights (lonely nights)
I'm wondering if I'm ever gonna get it right
I'm gonna change the way that I feel
And let the light in, let the light in
Take away this shield
Seems I've walked a million miles in the dark
(So far to the nearest star, I'm alone)
Walking circles, treading dark grooves, stuck in my past
(Alone in my heart)
I'm gonna change the way that I feel
And let the light in, let the light in
Take away this shield
I'm tired of walking lonely
I'm tired of hearing only echoes from the underground
Somewhere a star is shining,
Somewhere a light is rising to the dawn (to the dawn)
I'm shining...
I'm gonna change the way that I feel
And let the light in, let the light in
Take away this shield
Feel... let the light shine through
Feel... let the light be in me
Real... I want to feel