So I'm having a hard time dealing with this right now

My fiancé and I have been having a lot of problems where the engagement was put off, he took my ring from me, didn't wear his ring and was being very secretive with his phone so I reached out to an old encounter because he knew me for quite some time and I really really needed a mans input on what was going on between my fiancé and I I even at a point thought he was cheating on me because of all the secretive routes he was taking with his phone

Now nothing happened when I went to see this guy for some insight on my relationship but now I am just full with guilty conscience because I know my man would not approve of the person I chose to reach out to

What should I do?

Tell him or not tell him ?

He's lied to me in the past and kept it from me I just don't want to lose him cause I didn't do anything to jeopardize our relationship but I really needed someone's insight that really knew me