There's nothing wrong with going through the process of starting to see your parents as people and less as authoritative influences. Getting angry with them, for some reason, seems to be a natural occurrence to overcoming parents that may have exerted a little more control than is typical of other families.

Nothing like others using guilt/shame techniques(i.e., they are you parents you 'should' love them, just look at 'how much they have done for you.')

Do you have access to an on-campus counselor? Sometimes, you can bypass your parents insurance bills, in order to get on-campus counseling, so they don't have to know that you are seeking counseling, just in case, they are the type of parents that wouldn't 'approve' of counseling. ((hey, been there, done that))

Maybe, less talking to these people in your life, that are invalidating and being less than supportive, and more time talking about this in therapy??

Having no siblings to turn to, compounds everything, don't it?