think of it as that. he is mostly giving you 6 days a week, and only 1 day for his friends. if you want to experience his nightly/early morning crawls then setup date nights that would be just that.
as for your insecurities, that is on you alone. from the sounds of it, his track record proves otherwise. your neurotic thoughts towards his level of committment can only change if you make the change. reflecting on sejabins advice, why give him this much attention? apart from being a bore, he hasnt done anything that should be of concern.
from the scope of it all, should both of you really be in a relationship? on one side, you have a guy close to hitting 40s still hanging onto his youth. and on the other side, you have a girl who has trust issues. that to me, is incompatibility.