There are about two hundred million things you likely need to try first before you turn to an "open" relationship to "spice up" or "fix" your current relationship.
Not to mention all the other surface layer and hyper rationalized crap I hear couples tell me they tried before actually doing their real work.
Until you have done those things I'd have to go with a, Hell No on the idea of bringing other people into your bed. Super bad idea.
Shallow "solutions" never fix deep problems.
Personally, I couldn't agree more with JP on this matter which is why my clients all go through my Mastery for Motivated Men coaching program FIRST to deeply examine motivations and core integrity around relating and sex.
Learn how to create a great social circle first maybe... maybe learn how to go deep because you are deep ...just sayin...