The skills, wisdom and attributes you need to be able to do 'casual'/FWIB safely and without causing harm to yourself or another are the same needed to create a conscious Spiritual Partnership.
The skills, wisdom and attributes you need to be able to leave an unhealthy relationship and move on cleanly are the same needed to turn that same relationship into a conscious Spiritual Partnership if it were ever possible.
The skills, wisdom and attributes you need to be able to truly be 'OK' and at peace with being alone and without a partner are the same needed to create a conscious Spiritual Partnership.
The skills, wisdom and attributes you need to be able to live a 'poly' lifestyle without completely traumatizing yourself are the same needed to create a monogamous, conscious Spiritual Partnership.
Whatever path you choose (or think you are choosing as you unconsciously try to avoid the perceived pain of intimate relationships)... the ultimate truth remains the same.
You weren't born to play small and live a life governed by the terror of being hurt/rejected/abandoned.
So stop kidding yourself.
You were born with the full potential to live boldly, on-purpose and to be led by Love, no matter what past experiences have made you so afraid of relationships.
And, IF you can learn to live that way, to step into your power AND surrender to the process, you'll then be ready for the thing that up until now has eluded and terrified you.
The kind of partnership that you've previously only dreamed of exists and is absolutely available to you.
But will only come when you make yourself actually ready for it, as opposed to just wishing for it to appear while simultaneously taking actions that steer you away from it.
In the end, you have no choice, my dear.
You must become the version of you that you were born to be