Paul acknowledged that at the beginning of his walk with Christ he stood completely alone. His new way of life, the words he was speaking were not well-received by anyone. 
He would have lacked encouragement and support except for the Lord stood with him. He alone strengthened him. 
People may fail us. But the Lord never will. You’re looking to serve Jesus first and foremost. Realign your focus. Set your affection on things above. 
Scripture taken from:

II Timothy 4:16-17

Colossians 3:3