What do I do?

What do you do when you no longer do it for your spouse? He loses his erection during intercourse and has a very difficult time climaxing ever. He swears it's not me but after months of trying to have patience and trying new things my ego can't help but feel like I just don't work for him anymore and it hurts. He just gets angry when I try and talk about it. After 14 years together I am thinking maybe we just don't work and it's time to seperate