I'm not jealous of other couples. I enjoy seeing people together. I like to try to figure out what they have in common or what kinds of things they like to do. So many couples end up being almost mirror images of each other. Adapting each other's patterns, words, movements, lifestyles. Slowly peeling away the unnecessary parts of their own beings that do not enhance their coupled effectiveness.
There are some that seem destined for failure. Where they are pawing at each other in public, excessively. I suppose they could be just be highly affectionate. But it's more likely they are very insecure and have to reestablish their "coupleness" so as to prevent any interlopers. They are not confident yet as a couple.
I would be jealous of my own mate, were I to have one at this time, as I am quite demanding of attention. I am very insecure too. hahaha! I've been in enough neglectful or abusive relationships that I am very wary. I liked myself to the feral cats I tend. They start off by running and hiding. Coming to the food long after I've gone.
They they begin to realize I am a source for nourishment of the food and water kind, and their survival depends on it. They begin to expect that food, from me, but are still wary. Depending on the cat, it can take a LONG time before there is any sort of trust.
One abused cat would be so funny. She'd come running with her tail up, all happy and meowing, until she got within 5 feet, and then her ears would go back and she'd growl and hiss. Again, I'd back off, and let her eat by herself, then later get closer, over months.
I'd get then so she'd let me be near by, but if I tried to touch her, I'd get scratched, deeply! Ouch! It took two years before I could stroke her and have her be comfortable. And it took another two years in the home before she was really truly at peace. The reward was her great affection and love. She would groom my head at night, while she lay on the pillow next to me.
She did a lot of "testing". Like liked to play "jump the head" in which she'd repeatedly jump over my face, first fast, and then eventually practically dragging her belly on my face. That is the ultimate TRUST for a wild or abused animal. As it fully exposes their belly to my mouth (which could bite).
I wandered off. Geez. But it would take a lot of work for me to be able to trust someone in a relationship, maybe years. Of constant devotion, not getting upset with me if I panic or hiss or growl or scratch. Knowing that those reactions have little to do with the actual person in front of me, but instead have to do with the past and all the crappy experiences I've had before.