What should I DO

So my gf (50) and im (37) We met after during my separation. We hit it off and she was great... after a year I proposed to her.... she made plans to live at ur house eith her two.daughters 23 and 25 at thentimr.... so I moved jn with my 9 year son... I also spent a fortune renovation for this to happen... so truth be told...she caught me doing drugs....couple times.....but she stayed...eventually we got.fifjtimg alot snd she broke up and kick me out... So I left...about a month later we got back together after she.seen I was hanging out with other females.... we worked on things. And.it was good.again. However aftern5 months after every little.figjt...she wanted to break up... she wasn't caring anymore...she didn't put thr effort.in like the past.... soon enough one day..she said she didn't wanna talk to me anymore.....blocked me from everything...and we not.gjcd me.1.mjn of.time..... sure enough 2 weeks go.bye...gets wind of me snd another girl...snd we start talking again.... now I am.totoally in love with her...I.never wanted to.brrsk up...not once.... im always the one being emotional.... always calling etc... she says we're together but refused to.were her.enaggement ring....her fb status even says single.still....but she comes stays eith me...every day off..... if she dated me...hr one daughter wouldn't talk to.her ..so.she is showing she cares....but she won't commit anymore...... what do j do....? I still wsnt to marry her and be eith her...move.jn together again....