What would be the purpose or goal in being hospitalized at this point? Are you in danger now?

You should definitely talk to your treatment provider(s) about this question. If you still think that there is a chance that you would become suicidal and act impulsively, then you need to have therapy to learn how to manage those feelings, thoughts, and impulses. DBT is designed just for that, and is something you could definitely ask about. You should also have a safety plan, written out, with phone numbers for your treatment providers, emergency services, and support people and outlining clearly what you need to do if you have those thoughts and feelings and impulses.

The purpose of psychiatric hospitalization is to keep people safe when it is not safe for them to be elsewhere at that time. Or, sometimes when there is a specific treatment goal that is best served by being in the hospital, such as rapid adjustment of psychiatric medication, or detoxification, or some intense treatment programs. If your last suicide attempt was more than a year ago and you don't know when you will feel suicidal again, there is not a good reason to hospitalize you now, unless you feel that way now or if you know that for some reason you are going to be unsafe in the immediate future. But if you are still afraid of feeling that way, then you should be in therapy and getting appropriate support.