Heartrending
Part of speech: adjective
Definition: That causes great grief, anguish or distress That elicits deep sympathy
Sorrowful
Part of speech: adjective
Definition: Of a person, full of sorrow; exhibiting sorrow; sad; dejected; distressed.Producing sorrow; exciting grief; mournful; lamentable; grievous.
Example sentence: There's a formula Chris and I used all the time. When you least feel like it, do something for someone else. You forget about your own situation. It gives you a purpose, as opposed being sorrowful and lonely. It makes me feel better when things are too hard for me.