This is the problem of their relationship at its core. There is no conflict. Relationships are built upon Resolution of conflict, something that can't happen when there is flat out nothing to conflict over. Conflict helps to build not just the individuals experiencing it, but to really show the lengths the other party is willing to go to in order to resolve the problem. On an even more base level conflict is a lot fun when done in a playful manner. There is a reason you know when two people are good friends after they can rake each other over the coals and come out laughing. Getting a bit more advanced, people only really know who the other person is by seeing them in a crisis situation where the social masks come off and things are not as prim and perfect as we would like others to believe. Its why relationships that look like they are doing well completely collapse when they move in with each other. The masks come off and the other party (or both) don't like what they see.
Shoe and Greg live entirely separate lives that occasionally intersect on twitter or a short trip whenever Greg needs views for whatever shitty video he is making. Shoe outright bends and even breaks to get out of the way of any kind of conflict with Greg. She is constantly putting up an act not just for her followers, but for Greg as well. Greg was of course a moron to ask someone he hasn't even really lived with (and likely doesn't even truly know) to marry him, but he has made it almost abundantly clear that he really had no intention of following through with it anyways and Shoe on some subconscious level is also perfectly okay with this because she is too insecure to actually show Greg who she is out of the (very real) possibility he rejects her.
I do believe that is changing though, Greg is getting increasingly bored with the act and the mental cracks of this facade are showing more clearly than ever with Shoe. it might take a few years, but when this blows up it will be glorious.
