Hi and thanks for your question.
First, you are not required to have an attorney representing you in obtaining a divorce -- you can do it yourself. In fact, Utah has a program where if you have less than 6 children and you and your husband's combined monthly income is less than $10,100, then you can use the court assistance program to help you with your divorce.
Here is the court website link -- scroll down a bit and click on "Court Assistance Program" - this should be very helpful to you.
Second, your husband doesn't have to agree to divorce you for you to get a divorce. You can file all of the paperwork to get the process started and if he doesn't participate in the process or show up to court, then he could be found in default by the courts and you would still be granted a divorce.
With respect to your child, your history should be irrelevant unless your husband can somehow use it against you in your present situation (for example, if he were going to argue that you use drugs now, then he has a better chance of being able to use your past against you to support his claim that you are using now). Since you have been sober for 5 years, have a steady job and are a good mom now, then that's what the court should focus on in deciding custody of your daughter.
Your sexual orientation, OCD and depression should have nothing to do with the court's decision on custody, so long as it doesn't affect your daughter's safety, well-being or best interest. If your sexual orientation, OCD or depression are somehow harmful to your daughter, then that may be relevant, but from your post above, it doesn't sound like this is the case. If he were to argue this was the case, then you would have a strong argument that if his allegations were true, if he's so concerned about your daughter's safety now all of a sudden, then why would he have let you be alone with and care for her at any time? It sounds like you were sober for at least 2 years before your daughter was born, so you would have a strong argument that this has never affected your daughter.
I hope that this answers your question; if so, please click Accept. Thanks very much and I wish you the best here.