<human>: I'll try to be as brief as possible. I (M/ 26) dated this girl named Sara(F/26) and we broke up, it wasn't a huge deal it was in high school (for 2 years) and we remained friends throughout the years, occasionally we would get drunk and fool around. This was rare as we went to different colleges but it continued to happen. 

Eventually Sara and I lost touch and we both started seeing other people. My girlfriend Lucy(F/24) and I have been dating for 3 years. Lucy is a nice girl but she is 100% dependent on me for almost everything (money,  support) as she moved across the country to come back to my hometown with me.

Sara and her boyfriend Dave(M/28) have been together for the same amount of time, Dave is a good guy but he has a few mental issues and extreme anxiety so he rarely leaves the house, lost his job etc etc. 

Sara and I have been seeing each other (non physical) in Secret for the last year because neither of us can bring ourselves to break up with our SOs. I know the though is if we REALLY wanted to be together we would be, But I have guilt for bringing Lucy halfway across the country and then just bailing on the relationship and Sara is afraid Dave will hurt himself if she leaves.

My and Sara's relationship is suffering (obviously) because of our" real"  relationships and my" real"  relationship is suffering because of Sara. And neither of us wants to stay in our current relationships but neither of us can leave.

Can you condense the text into three sentences or less?
<bot>: I'm in a (mostly) nonphysical relationship with my ex and might be afraid to leave my gf because she is afraid to leave her bf