You are desperately trying to convince yourself that she wants you, and only you. You are being deceived. She is making plans with you because she wants a sugar daddy to take her and the kids on vacation. Vacations aren't bad. I'd go on one with a complete stranger if asked, and, if they were paying.
You are swallowing her nonsense whole part and parcel, and, when you get good advice from the brothers here, you want to dissect it into microbe sized pieces for analysis.
She wants you for a stable relationship, and wants studs on FB, IG, tinder, etc... to have sex with. You bore her, but, you provide for her. She'll give you attention while you are doing good things for her, but, she'll be thinking of sex with the bad boys.
You tell us: Why does she like the guys on other websites? Because they stimulate her intellectually? Because they can teach her how to treat you well?
Sorry, Pal, you're being used.