In the Name of Allah, the All-Merciful, the Mercy-Giving

 

All praise is due to Allah. Peace and blessings be upon His Messenger Muhammad.

 

I think you are being complacent about making up your fasts. The reasons are clear: you do not have the firm resolution or determination. As a Muslimah, you should summon your spiritual resources and ensure that you make up the fasts you have missed and never allow yourself to be slack about it. If you have years of fasting due on you, you ought to seek repentance and make up as much as you can and give charities to compensate for that which you cannot.

 

Almighty Allah knows best.