Where to begin well it's simple.
There's a cheaper way of saying this but I won't be the one to deny you the manners a old soul like I have been raised to do as such.
Not everything is going to be as you try to make it life will and is actively seeking to throw a wrench into your plans when the opportunity gives it a chance. Don't be the one to let it, Don't stay for comfort and convenience. But one for the love of yourself don't stay because you are afraid to be alone... Some lessons we learn the long way not the wrong way because all lesson's are not right and wrong even the hard painful moments have good lesson don't say you learn anything a wrong way it's all trail and error.
Now about errors.... Those are things we do make like myself I made a massive error after my ex six years into the relationship was asking me to sleep with other men and justified the idea do to the fact I had slept with one person before being with her and she had not been with anyone else.
This was disheartening and soul shattering to hear but I'm justification I gritted my teeth worked through it and no it didn't happen but what did was years or tormented that could have been avoided if I listened to my gut and wasn't afraid of being alone. Ah see what I did there brought back the intro into the mix.
What I'm trying to say is stand up be strong communicate with eachother for Christ sake don't like something don't attack them say "hey I'm feeling a little bit upset with something that's been going on can we talk about it" all it takes be adults and know yourself and needs so you can grow together as a pair not a rivalry between House's your not God damn Romeo and Juliet your frank or Tony or Bill and Jean or Tena or whoever.
Team up work your shit out and if you can't don't fold in to there demands and lose yourself in the process like I did.
I have nothing I lost everything but hot damn do I got stories traumatic experiences and knowledge to deal with it also training and therapy to be who I am today so ya stick around don't I don't mind it's the words that are read by those who need them most that are important love, life and lose three big L's.....
Nobody needs to do any of them alone.