Hi TM i consider all my friendships to be lifelong commitments, even when we part company to focus elsewhere. I don't believe in terminating things on a bad note, but resolving any issues so all relations remain open stable and healthy.
1. for what you need, do you think you could find a partner open to polyamorous or multiple partners? swinging? some ppl manage to keep committed relations while having open marriage or swing with other married couples so it stays consensual and safe, both physically and emotionally
2. I believe a lot of these physical or sexual attractions can be spiritual karma. So if you always work to resolve your relations fully with each person, it is more clear which are platonic relationships and which are the significant sexual/romantic partners. If you go by consensus in making decisions together, nobody gets hurt, and you will find partners who agree to the same things. I think it is a matter of finding the right "primary" partner, and the other relations will work out from there.