Let go of whats not mine

So yesterday I talked about the one...I am having trouble letting go of someone...and I have been reaching out to different people who I know will pray for me and encourage me in the things that are right...well one persons words struck me. She said Let go of that which is not mine. To fight for my walk with Christ. To fight for my future husband and children cause if I don’t then who will? I think what struck me the hardest was the let go of what’s not mine. He’s not mine and if he’s not then I am someone else’s and so is he and all we are doing is hurting ourselves and those people...some how some way I got to get him away and let him go...I am not sure if he knows this blog exist and I am not sure if he reads this.... I have nothing against him.... but I know that I know that I know that God is calling me away from him I just have to get the guts to cut the ties completely.... I will.... right now I am gonna seek the Lord with whatever I can cause I need him more and more and more.... please pray that God will give me strength