You can try one of my lists. I don't care for angst so it's rare it shows up. Most of the ones on this list are in good relationships. http://www.mangago.zone/home/mangalist/14607/
Most these are fairly healthy: http://www.mangago.zone/home/mangalist/78229/?filter=&page=1
This list should be fine..
http://www.mangago.zone/home/mangalist/8523/
Hmm....so I can't recommend u something with both BUT I can recommend you them separately, if u don't mind -
Good Plot - http://www.mangago.zone/home/mangalist/25771/
Sexy Time - http://www.mangago.zone/home/mangalist/26617/
yaoi with healthy relationship/good plot and sexy time, please! ლ(´ڡ`ლ)