How badly do you want it Yvonne? Write down on a piece of paper what you are asking God for and every time you feel the temptation to break your fast go to the paper and read what you are asking God for. Then say to yourself, I am about to fall short and break this fast therefore, I am OK with God falling short and not fully giving me what I am asking.
Think about that. If you want to fall short on your fast be willing for God to fall short on His fulfillment.
Remember this scripture and pray it in your moments of weakness 1 Corinthians 10:13 “No temptation has overtaken you but such as is common to man; and God is faithful, who will not allow you to be tempted beyond what you are able, but with the temptation will provide the way of escape also, so that you will be able to endure it.”
Ask God to show you the way out from that temptation.
Blessings & the grace of the Holy Spirit to follow through to the end.
God Bless you