Yes yes yes... stick to one girl and all
that promise of monogamy and showering of love, care and attention
to your chosen one.
My friend, that could only happen if the person materialise as
reality and becomes your girlfriend. If not, it's basically
surreal.
Countless of guys often give airy speeches like how loyal they are,
you know those typical nice speeches that adds minimal 'brand
position' and marketing effort.
It's like a salesman telling you 'Hey buy this car; it has a
steering wheel.'
Duh.
On a general note, you purchase a car because you wanted
convenience; you want to drive and not because it has a radio
imbued inside. If you want a radio, you would buy a radio - not a
car.
Double duh.
Relating back; you can't sell honesty/loyalty as a quality for a
dating candidate - it just doesn't stir interest. (Of course woman
would want their boyfriend to be loyal and honest - you know the
analogy above? Therefore, you can't sell 'duh' as your USP. You
know, a golden retriever is pretty much loyal as well, so if
loyalty is the only quality you can sell, actually she could just
settle for the former). Take note that I mentioned dating candidate
- not boyfriend/husband - loyalty for the latter is critical, but
loyalty for a dating candidate is like huh?
People would tell you 'oh that belongs to the husband material',
but pray tell me if you can't even make pass the first step and
succeed in dating, how the hell are you going to be a boyfriend to
your chosen one?
P.S: CuriousOrange, if you are around, please drop him your two
cents. 
Cheers