It's always been Sign Of The Times by Three Days Grace for me for some reason

Deliberation by Cody Chesnutt

Time Adventure, from the ending of Adventure Time. (Though fav adventure time song is always 'Everything Stays')

You Were Meant For Me, by Jewel

Remember when, by Alan Jackson

Deer Dance - System of a Down

Concrete Angel. I literally cant even hear the music without tearing up

Asleep by The Smiths
or I Can Make You Love Me by British India

Fire and Rain by James Taylor
I played it on repeat the day I lost my grandmother, when I lost my Dad, when my first Dog I loved like a baby died, and when. I had to say good bye to my Cats just recently.
It makes me cry my heart out but makes me realize there be a day when we all see each other again.
Also Here in Heaven by Eric Clapton. It's his song about his little boy that died by running out of a floor to ceiling window that was open in a high rise building. He was just a little boy and he fell to his death.
Kills me every time.

More Hearts Than Mine by Ingrid Andress

Winds Beneath my Wings - Bette Milder (from the movies Beaches)

I Hope You Dance by Lee Ann Womack
or
Say Something by A Great Big World ft. Christina Aguilera

Wish You Were Here, Pink Floyd

Honey don't - The Gin Club

After The Storm by Mumford & Sons

i'll wait for you by joe nichols

any song by cavetown, that sweet boy is full of feels.

big, bad John

Landslide-Fleetwood Mack
The older I get, the more it hits the feels.

I cum blood by cannibal corpse

Here Comes a Thought from Steven Universe

"If I saw you in heaven"

Everybody Hurts - REM