It's not true though, at least if I assume that he means what he says.
He says being romantically involved is fine. In the failed attempt he was just not all too happy with my case of NRE (my fault), because he was afraid he'd be less important. He's fine with me being romantically involved as long as he will always be #1. I feel that I cannot guarantee that, even though in the particular case I mentioned it would not structurally change anything for Bambi.
Either way, the trouble are a while ago now and he seems much more happy to talk now and he does not mind the idea theoretically. The part we keep getting stuck at... He says it's all good as long as I promise it won't change anything significantly between us. I don't feel it will now, but how can I ever speak for the future?
Bambi - Boyfriend of 1+ year
Tizza - It's complicated