Lost and confused

Been with my spouse for 10 years, married for 3. I believe in my heart he's messing around. I don't have solid proof, just the little signs...of course he's fine this before but before we married. I was dumb to forgive and try and then get married thinking he could change....I know in my heart I don't deserve this, and there's no point of confronting him because he's only gonna tell me what I want to hear. This is my first marriage, and I guess I need help in how to just end it... there is so much to type it's like a life time movie