You say he has cheated before, why did you take him back? But recently, she started messaging him, and they have been hanging out as friends.
You should tell her how you feel about it, and keep it respectful.
When I brought it up to him he straight up went to lie about it but I already knew the truth hey sam145 I would firstly like to welcome you to this wonderful online community and would like to say I'm really inspired of your incredible strength and bravery in asking for help and telling your sorry.
There are around 8 typical behaviours of cheating partners which you can learn about at chumplady.
I have learned and keep on learning about all the ins and outs of a relationship for both men and women.
The partner we are trying to leave contributes to this.