I don’t know, I love him.

I know I’m idiot for staying so long. Me and my partner have had issues before dealing with distrust( a year together). 4 months ago me and him had a long talk and we promised to make it work because we love each other so much. He won’t change. I keep finding other women in his phone. Him sneaking off to see a woman I’ve confronted him about five other times before. He keeps promising me he’ll change and it’s just that I’m his only one. But I can’t deal with heartache any longer will he ever really change or does he just like having me around begging for him I sound so stupid I just can’t deal with this I love him so much. He goes through my phone and I answer his calls and text the second he calls me. He has a huge double standard for me I just don’t know what to do, why is it so hard to let go.