I am so sorry. Perhaps, if you thought of and tried to see things through his perspective? Are your expectations then honestly realistic? Think too of what his life maybe like. Children, a relationship? If things transpired the way you want them to how very fair would that be? How would it impact him, his relationship, and life? Perhaps too think that you are very fortunate to have what time and help you do get from him. Accept that there are limitations. Limitations and boundaries are not an indication of your worth. Remember that. Let him know you acknowledge them. It is perfectly alright to let him know you find them difficult but let him know you will try. That will actually bring the two of you closer together than further apart. I know this is upsetting. I understand the situation feels impossible. Changes don't have made overnight. You can take them step by step, goal by goal. If you manage to accomplish one part of this seek acknowledgement you have done so. It is in this way you two can still work together