That is how you know that he will always be committed to you and show up for you. Even when he does stupid things or makes mistakes, if he adores you, he will not want to lose you.
Just because a man is attracted to you, gives you attention, spends time with you, or may even enter a relationship with you, it doesn't mean that he actually adores you. Maybe he just feels lust for you. Maybe he's going through a rough time and just needs your validation. Maybe he's looking for companionship because he's lonely. Maybe you're just convenient for him and serving needs that he would otherwise have to go solicit. If he doesn't adore you then it's only a matter of time when he gets bored and loses interest. If he sticks around then most likely it's because he's getting something useful from you. You're a placeholder. Once he's healed from his traumas, has his sights on new goals, or can replace whatever it is that he's getting from you, he'll move on.
Learn to distinguish the difference between attraction and adoration by feeling a man's energy. A man who adores you doesn't lose that energy over time, but a man who is only attracted to you for any of the reasons I stated above, you'll feel a change of energy in him over time.
I've had great relationships and I'll tell you that when a man adores you, you can physically be worlds apart. You may not even talk to each other on a regular basis. For whatever reasons, whether it's work-related or maybe you two just enjoy your own space. Whatever the case is, you never feel like their energy is gone. You never feel like they've pulled away even though you haven't seen each other in months or years. But when you do feel like he's holding back or the energy is fading...you're not imagining that. He doesn't have adoration for you. Whatever you had at the beginning was limerence, lust, unhealthy attachments, etc.