Sometimes I feel like crying..but not because I'm sad

Lately I have had urges to cry. Like when I see someone randomly helping another person, or when I think about all the blessings in my life. Or even when my family is all together. I think that I have underestimated a lot in my life. Like the importance of family and spending time with them. Its a depressing thought but you don't know how much longer you have with your family and friends. I don't want to waste another minute of life. I see everything that I still want to do , and I have barley started yet. Every day I have been blessed with God. My family, friends, Job, church, even just having another day. I pray that God can help me remember to live my life for him and to the fullest. I think it would be disappointing if I wasted the only life that God gave me. I want to stop worrying about material things and start loving what I have.