Im dating girlfriend for about half a year now, and a month ago she came out as poly. Im mostly glad she is a lot happier and less anxious now, but sometimes jealousy flares up anyway. We are both very open with our feelings and im worried that all the cool people she has a crush on are better than me and more conveniant to date since they live closer.

For some context, about two year ago i my ex also tried to have a second relationship and was very bad at dividing her attention, and mostly kept me along because i was something she could fall back on if things would go wrong, and the last year i only saw her once every few months, even though we lived within walking distance. She was basicly having a momogamous relationship with the other person while only chatting with me once a month.

It gave me a lot of anxiety im still not over and while im not worried of my girlfriend behaving like my ex, she is already great at balancing a big friend group while my ex didnt have more than 2 friends that she mostly ignored. Some things still give me a lot of anxiety like her moving in with her partner for uni, i know its for practical reasons but it sort of hurts that it isn't with me since they know each other for only a few weeks and then already move in together. Also since moving in was the moment my ex decided she didnt need me anymore.

Does anyone have any advice that helps deal with getting over the trauma of being kept around and abandoned when she didn't need me anymore?