About a month ago my husband and I separated for about a week when he decided to come back he told me he liked someone else?

He told me he chose me, he said he didn't do anything with this girl and he didn't want to stop talking to her because they were just friends. I told him to get the hell out and he eventually said he will stop talking to this girl... never told me who she was or anything now a month out i don't trust him he went out last night with friends and im so upset because i don't trust him something inside me is saying he's not being truthful am i being paranoid?
About a month ago my husband and I separated for about a week when he decided to come back he told me he liked someone else?
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