You cannot love people the way God loves you without God's power in your life because human love runs out. If you feel that nothing seems to be worth the effort, or life seems to be futile, or you find yourself blaming God for your problems -- "Why did you let this happen to me?" - these are warning signs of spiritual burnout. 1 Timothy 4:8 says: "Take the time and trouble to keep yourself spiritually fit." (Phillips)
How do you stay spiritually fit so you can love people? By building spiritually refreshing habits into your life.
A Daily Quiet Time - "This is the reason we never lose heart. Our body does suffer wear and tear but every day the inward man receives fresh strength." (2 Corinthians 4:16) Outwardly our body suffers wear and tear, but inwardly we can be spiritually renewed every day by spending time alone with God.
A Small Group - A Christian without a small group is an orphan. You need a small group. The Bible says, "Let us encourage one another." (Hebrews 11:25) You need to get together in a small group at least weekly where you can share needs and problems, where you care for one another.
Worship - Praising God will renew and rejuvenate you. Psalms 59 says, "I will sing of your strength in the morning and I will sing of your love for you are my refuge in times of trouble." You need that emotional release and that recharging that comes from singing. Put on a Christian tape or CD, sing along and see how God restores your soul.