I am going to ask you some questions for you to think about. You do not have to answer them here. Just... consider them. See if they help you sort.
Are you able to identify feelings?
Are you able to articulate them to yourself or to others clearly?
Why are there no hard limits? Are you comfortable setting limits about what you are and are not up for?
You cannot be wide open access to someone you just started dating/living with. (keys to your house, car, bank account, etc.) Those come over time. Not in a big whoosh. Are you agreeing to things faster than you want? Are you good at saying "No, not at this time." to people?
And some of your things you may never want her to access. (ex: Making decisions about you in hospital like pull the plug or not if you end up on life support. You may want to reserve that decision for you only.)
How long did you date before moving her in? Why move in at this time, rather than later on? Are you compatible for dating
but not for cohabitating?
Why is this group practicing a delta triad model? Why is this delta having threesomes?
Do you more naturally want to practice a "V" model with you as the hinge? And them not involved sexually or romantically?
Were you unprepared for the intensity of a delta triad? (Which is basically 3 V's stacked up on top of each other.)
Does this group have the interpersonal and interpersonal skills required?
Is this about adjusting to change? It's normal for things to feel weird in transition. The "old normal" is gone. The "new normal" isn't here yet.
it's still so weird to see my husband with another woman. My mind is turning against me and I feel so inadequate and ugly.
It just can't be weird cuz it's new? It has to be weird because you stink?
Are you in the habit taking responsibility for things that are actually not your responsibility?
Are you in the habit of beating yourself up? How is this kind behavior toward you?
Are you experiencing jealousy (afraid hubby will take / get what you have now -- your time with the GF)?
Are you experiencing envy (coveting what hubby has for yourself -- wanting to take /get his time with GF for yourself?)
Are you experiencing cognitive dissonance like "I feel jealous/envious of hubby" vs. "I should not feel jealous/envious of hubby cuz he's my hubby" or similar?
I'm excited about her and being with her but I find myself holding back with her until I can get over my obstacles.
What is your plan for how to get over the obstacles?
Does it occur to you that sometimes HOW you get over your obstacles is by NOT holding back? You jump in and swim even if it gets a little messy or less than graceful at first. You accept you are new and through practice you will develop your swim muscles and get stronger at it.
I think confidence is grown by doing, not by avoiding. Relationships are participatory. So... participate,
relate with your people.
HTH!
Galagirl