I need help on this one

Is it wrong to date someone else if you've been with your fiance for 5 years and still not married yet but we have kids together and are relationship is complicated but I started to talk to someone else and I really like this guy but I love my fiance too I just want to see where things will go even though you still love your fiance I want to go on a date and see how this other guy is I like both I just want to see who really is for me I just want to see where things go is that a bad thing what do you guys think if I'm not happy right now in my relationship but I want to see how it goes with the other guy

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