Kimmerz, it is odd how they want to fight, isn't it? Mine did and does the same. She tries, I don't let her. I was "triggered" as recently as the beginning of the year. I realized it and put a stop to it. There are still triggers that have to be dealt with.
As for being grateful? Really? I don't think so. Be grateful he is in the kids life, but yours? I don't see how that is required.
You don't have to be mad forever either. If he is getting on your nerves and you are feeling overwhelmed overall, perhaps dropping a few things, like texting with him, is a good step for you? Clear the decks and focus on you for a while? I think that helps...it did for me.
They do it for a long time. I think it's part of their way of staying connected in a weird way. It continues until you put a stop to it. It takes time and there are plenty of emotions along the way.
Keep venting, but start taking action to reduce that contact as well.
As for single parenting? Yes, very tiring. TM is right, find a way to recharge. Take the time. You'll be more effective if you do.
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."