<human>: Can you succinctly summarize the text in 1-3 sentences?

So we are a very non traditional couple, that up until now have had many threesomes, but only together. My husband has always suggested I get a girlfriend because I have never had one and he thinks I would enjoy it. Recently, I met a girl who seems to want to try - but I have some mixed feelings about it. For one, I've never done anything without my husband being there, so the idea that at times she and I would be having sex without him makes me feel a little guilty. He says he doesn't mind, and I believe him, but I wonder how enjoyable it will actually be. Also, it's been foreeeeeever since I was dating someone. My husband and I have been married 2 years and we started dating 5 years before that. I can only remember being in the comfortable stage of a relationship - so I have no idea how to approach dating from the beginning again, let alone with a girl!     
My questions are:    
1) What is the normal procedure for two people who just begin to date??    
2) Should I give it a try with this very open-minded and I'm sure very understanding girl if I suspect that I might end up feeling uncomfortable about the whole thing and would rather stay FWB?
<bot>: Been married 2 years, kind of open relationship. Husband suggests I try a girlfriend; find a girl I like and consider. Don't know how to date anymore, and a little nervous about doing things without husband. Wat do?