First of all, I'm sorry that you're having these urges. It must be scary and a bit mortifying as well.

You said, I think, that your therapist said you do it because you have trouble being alone. That and the unhealthy attachments, especially outside of BP episodes, sounds like something perhaps DBT-type therapy may be able to help; it may help to curb your urges and find healthy ways of dealing with being alone. Though your current therapist sounds insightful and hopefully she can help you with this.

As others have said, you are brave to bring this up. Best of luck in resolving it.