Leaving 5 yr relationship

Am I reasonable for wanting to leave? For a very long time now I’ve been unhappy, I’ve fallen out of love, my partner always gives me the cold shoulder when I try to bond with him, I feel completely ignored, trying to connect with him and him ignoring me constantly causes me physical pain and stress my heart actually aches and my arm aches. I always try to get him to do things as a family when we’re both off work but he’s always “too tired”, even simple things like going outside for a 15 minute walk, I don’t ask for a lot. I told him I’m done and all of a sudden he says he was depressed and unable to give me what I wanted. The issue is, I was also very depressed and he made it worse as all I ever get from him is constant criticism and I RARELY if ever hear anything positive about myself from him. I’ve been recommending we go to therapy for a long time, he always said I was the one who needed therapy. Now of course when I’m ready to call it quits he’s willing to go to therapy. Also, a few years ago he broke my heart when I found he was flirting and texting other women and I found out recently he was texting this woman again who he SWORE, crying on his knees he’d never text again. So I definitely don’t trust him. He’s a good father to our 1yr old but I feel done with our relationship.