After all, no one knows your marriage or your spouse better than you do. Texting affairs are the gateway to emotional and physical affairs. Of the infidelity cases I've dealt with in the past several years, the vast majority started out as "innocent" texting between opposite-sex friends or acquaintances. You are not over-reacting by insisting that a spouse end a texting relationship that you feel in your heart is undermining your marriage, and you are not over-reacting by treating it as a form of infidelity.
My only remark: I’d personally not wish to hear that he is soooo busy and has been too busy to call me before (see above – oh, this might be the reason why I have not answered your texts 😉) but I understand the intention to be not romantic but “laid back”, if I’d walk in your shoes. But from a girl’s perspective: you want to be laid back… why again? Because you feel like an idiot if she says no? And then you can say “Oh I really was not interested and just called because I was bored”. (?) No, really I personally don’t get it. From my experience guys who really dare, expose and are courageous are always appreciated more than these “cool/busy guys” (girls know instinctively if you are REALLY busy or just making it up to seem more interesting 😉 – trust me on this, we have to care for babies – instinct is our job). So don’t be afraid, after all men want sex, OK got it, but girls want sex, too – so what’s the point. It’s OK to ask a date. If she says no she is not worth it since she does not SEE you – another girl will, don’t worry.
I’m telling you right now that, if you do anything resembling this, you will totally creep the woman out. You’ve probably done this before already, thinking that if you didn’t reply to her fast enough, she might lose attraction for you or she might be upset with you because you take too long and that might ruin your chances with her. It’s so common in game.
A lot of these one liners are really good for text messages, but you really need to do a lot more than just a one liner to set yourself apart from the rest. Remember, today’s dating world is fiercely competitive and guys are up against a lot of other guys competing for the same girl all because it’s so convenient to get in touch with one another. Online dating is just making the situation even worse, when anyone with a selfie can sign up and get spammed by hundreds of suitors in a few seconds. Keep these in reserve for after you get to know someone. The funnier ones especially: who doesn’t like to laugh?