Help!

I'm a 47 year old divorced(for 3yrs) woman with two boys starting puberty and I've been premenopausal for about a year. I haven't been able to keep a boyfriend for longer than 3 months which really bothers me.

I have been depressed since I was 13. I finally looked for help in my early 20's with no luck until I was 29 and had to walk into the ER because I was suicidal. Thankfully I started seeing a phsyciatrist and started meds. I've been on a roller coaster most of my life. These last 3 years have sent me over the top even on meds and I can't handle it anymore!!! Help!!!