Sorry, but you haven't had a relationship for quite a while, not since she said she was bi and wanted an "open relationship":

• your wife wanted to be with someone else instead of you
• the only reason she claimed to want to work anything with you is because her first choice said "NO" - you're second until she can find someone "better"
• your wife refuses to even spend time with you or talk, which means she was lying when she said she wanted to work with you.

Yes, people change, but you didn't marry a bi woman who would be unfaithful and distant - where a normal marriage requires both fidelity and intimacy at a minimum. She's checked out and is using you. She is selfish as fuck and your marriage is over. Clearly document things, and find a good divorce lawyer. As she's the one who wanted the open relationship, the one who's unfaithful, she should be the one to move out.