How to handle a man with PTSD?

Hi everyone,

I really need to vent and express myself about this situation I’m in. I’ve been dating this man for about 3 months. He seemed genuine to me, uno the usual polite, respectful, etc etc. Boy oh boy was I wrong, so for the last two weeks his emotions have been all over the place..due to certain situations he’s put himself in legally..I’m aware he’s got PTSD due to his childhood abuse but I’ve never experienced such emotional rollercoaster. He’s always been open with me about his mental health struggles but I don’t know if he’s also got a personality disorder diagnosis or bipolar because he switches from moods to moods. Starts arguments with me..makes promises to me and never fulfils..I’m just wondering if these are symptoms of his PTSD. I’ve asked him to access therapy which he says no but his emotions are erratic at times…we had an argument this week and I guess during the argument I said something that triggered him and he was really affected since then it’s been up and down with him.

When he needs my support I’m always there for him emotionally, we pray and I keep him company but when it’s time to show up for me he’s always got an excuse for letting me down. For instance he will plan to see me and on the day he won’t come or he will lie and say something came up but why does he even propose to even come..it’s strange. He even promised to buy my son a present and bring to him even tho I never asked and on the day he just never showed up and he called me just trying to argue with me..I noticed his pattern so I would go about my day, go to the gym, out with friends and he would watch my social media and start getting upset I’m out??

Today was my sons birthday and he did not even call or message to say happy birthday to him instead he blocked me on WhatsApp and Snapchat? My instincts is telling me he’s wanting a reaction but he’s super erratic it’s unsettling.