I was in several polyamorous relationships, but in the end it has become a relationship with my first girl, who I have been married to for 30 years. There have been many challenges, spending time with different partners to avoid jealousy (that has always worked well), how is new relationship introduced to an existing relationship, how do you deal with breakups when there are multiple people involved and managing different opinions and values by all involved.
More recently I have stepped away from relationships with others, other than my partner. She is in a stage of her life where menopause is causing huge doubts and she is after stability. I love her and can understand what she must be feeling. However I cannot just switch off my polyamorous feelings. It part of my dna. That is a real challenge, but my love for her is stronger than the polyamorous feelings.