Are we compatible based on our signs and age? What should I do?

I am dating this guy, he is about 11 years younger than me. I am a fire horse born in 1978 and he is a snake born in May 1989. I am a divorcee w/3 kids and he never been married and has no kids. At first, I wasn't interested in him because he is younger than me, I don't think he can possible be serious about me. But he was persistence so I went out with him few times and I was really attracted to him. He was charming and caring and our relationship took off pretty fast. But now we are kind of in the rough patch, what should I do? Are we compatible based on our signs and age? I did gave him some hard times and was harsh with him because I thought he was not being honest with me. Thanks in advance for your advice and suggestions.