I get what you mean. You love each other and have happy memories that keep you hopeful but the bad is starting to outweigh the good. I’m not sure if ALL marriages and long term relationships hit this point but I know mine did. We could turn anything into a full blown verbally abusive fight which turned into us resenting each other. I wanted out but I loved him and part of me hoped we could somehow work it out. The fights became so frequent and we pretty much eventually started avoiding each other in our own home until one last fight tipped me over the edge and I moved out the very next day. Looking back now I see that maybe we should have given each other more space. My point is, sometimes when you are in a relationship for so long things become a bit boring or routine and this results in fighting. Giving each other space, time to miss each other and having new things to talk about, makes you WANT to say please and thank you to each other and brings back some of the happiness like during the dating stages. I think this would only be helpful if you BOTH have something new to do that way one of you doesn’t get jealous or take it as “they just want to get away from me”. Sometimes a bit of time apart is helpful. This sounds like one of those times.