God is so awesome! We are blessed everyday from Him, even on our worst days, and we can sometimes not even realize it.
I was struggling through, having a hard time praying one night recently, and I was asking God to basically tell me, or show me, that He really really does love me, even amongst my struggles and wrestling I gave Him. I was feeling confused about a lot of things that night and just needed some clarity. He showed me all I needed to know. I realized that I can feel His love for me anytime I want it, anytime I doubt myself, or feel like crap. Whenever I feel lonely, or unworthy, or I don't know what's going on, He still loves me.
I realized that we all have a steady reminder. A perfect reminder in fact. The Bible says that God sustains us, and that He keeps us going for as long as He wants. We are in His hands, all in perfect synchronization to His perfect plan of course. God holds us together, and fills us when we are hungry, and answers the door when we knock.
What hit me when I was praying, was that my own heartbeat was a testifying proclamation of God's love. It shows that He is keeping us going, keeping the blood flowing in us, even when we are not at our best. He declares that we are worth it to Him, that He wants us to keep up, stay strong, and most importantly, that He still loves us over all that we do against Him. We can deny him so many times, but He will never do that to us. He is unchanging and everlasting.
All you have to do, when confusion and fear takes hold in your mind, and when you feel like you can't go on, is to just put your hand on your chest, and feel His love keeping you going, beating away at His command, because you are worth it to Him, the God of everything. :)