That's coming - remember how slowly Jeph's story arcs build (and if that doesn't suit you, or tries your patience too far, then maybe this is the wrong comic for you).
I am quite capable of deciding for myself whether and when to stop reading, thank you.
This arc could quite plausibly wrap to a close with another Momo/Marigold session, three strips of reconciliation, and a joke. This would be forgivable. Every narrative needs interludes in which not much happens to lower tension and provide plausible amounts of time between crises. It would be unfortunate, though, because it would suggest that there is a standard love relationship that works by standard rules. Life would be simpler if that were so, but it's just not.
A sudden spasm of jealous fear is a sudden spasm of fear, and the appropriate short-term response is comfort. In order to decide whether jealousy is appropriate, though, people have to decide how they want to be together. Neither Dale nor Marigold have stopped to examine their feelings and figure out what they want to do, or to explain this to each other.
I really want them to decide that they are having a romantic, exclusive, intense, permanent love relationship that is the most important thing in their lives, because why would anyone jump off a cliff except in hope of flying? Not everyone sees love as jumping off a cliff, though, not everyone sees monogamous romantic love as flying, and therefore not everyone should want what I do. What everyone must do, however, is figure out what they do want and make sure the other person wants the same thing. As unpleasant as it is, you have to look into the depths of your swampy, overgrown, monster-infested heart and figure out which of those various flickering lights moving around in it you are setting your course by. As yet, no one in this arc has done this.
This is particularly important because each of them is the other's first sweetheart, and how they treat each other now is likely to form their ability to love and be loved in the future.