Each and every one of us has been granted with a deposit of God which we have to guard.  This deposit is the Holy Spirit that dwells within us.  Our bodies are the temples of God and we have to take the necessary care in feeding this temple with proper food:  what you eat is important for your body to stay healthy;  we need to take care of our mental health as well:  get a trusted friend or two to who you can talk to and start exercising since the serotonin levels will rise resulting in you being more happy;  stay spiritually healthy by committing to a routine in which you spend time with God:  connect to God first thing in the morning or prayer throughout the day (maybe when you are taking a break) or going to church to mingle with your fellow Christians and to receive the blessings from the sermon.

Although you might feel that you have disappointed God at some stage, He is the Lord of mercy; you will find mercy now if you have the right motive in your heart.  This grace of God will be evident to you on the day of the Lord.