I'm tempted to be in faithful to my husband. I am a Christian and I love God and I love my husband he is amazing but lately we have not been intimate or affectionate. And the way that I need anyway and all of a sudden my ex from a long time ago messages me and wants to talk to me more and decides he will be coming into town. This is not who I am and I don't understand what's going on with me and I've already blocked all his numbers trying to be strong but I still feel like if he comes into town I will be tempted to see him and ultimately be unfaithful to my husband, I am a leader at my church and I have no idea who to talk to about this without being judged and condemned. I am a child of God and I know the enemy wants to destroy me and I do not want to let him but this is so hard.
You have received a whole bunch of responses and even if I didn't go through them all, I think you already know what the right direction ought to be.
However, I will just say this: Next time, please don't get caught off-guard.
You now know a lot about yourself. You know that you're not a "robot"... but that you do have feelings, feelings that may turn into weaknesses if they're not met by the man you're married to... and hence the time ticking bomb; which only needs the re-appearance of an ex to set unpredictable things in motion (things you don't want, but which are now out of your control).
So I say again, please don't ever again get caught off guard. Speak to your husband about what doesn't seem to work, help him, teach him... and in the end he will literally "fulfill" you, so much that you'll never, ever again even think of another man in your life.
However, if the worst were to happen and your husband fails, then think of something else. It may be you entering a journey of transformation that will shape you into some kind of "robot" (i.e. no feelings), or it may very well be a break up with him, God forbid.
Whatever happens, I just want to insist that you must never again get caught off-guard. And one more thing I'd like you to keep in mind: God loves you, yesterday, today and for ever... whatever you do, He will stand by you. And I repeat, no matter what.
All the best.