Depending upon her size, a small step ladder may work.
To be honest, the person is your ex for a reason right. It is actually as simple as moving on, knowing your self worth and knowing who you are as a person, and finding someone else that matches you perfectly. If the person is your ex, then obviously they don't match who you are, and then there is someone else for you.
It's a mind set change, change the way you think about yourself and your life and the people you date/want to date.
find something fun to do. Something that makes you happy. You'll be alright.
Surround yourself with friends c: