Hopefully most of us have felt loved at some point in our lives.  When we got married or when we had our children.  God allows us to experience love here on earth so we can begin to understand just a glimpse of the love that He feels for us. I think the closest I can relate it to is when our children are born.  When that sweet baby is born, there is nothing that can make you not love that child.  That is exactly how God feels about us.  It is the most complete and perfect love there could ever be.  I am overwhelmed when I think of the love He has for me.  I am overwhelmed because I know me.  I know my mistakes, my faults, and he chooses me and he chooses you.  He chose each of us.  He allowed his son to die for each of us.  That humbles me in such a way that I want to serve Him all my days. How can we not be changed by that?
I have felt unlovable before.  I think a lot of us have and I encourage you that if that is you today, look up to a father that is desperately in love with you.  A love that is never-ending and unchanging, nothing you have done or will do makes him stop loving you.  His heart is brimming over with love for you.  He calls YOU the apple of His eye and His beloved.

John 3:16 For God so LOVED the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life.

That is the truest love!! Take hold and believe HE loves you!