Did you ever have doubts?

For everyone who is married or engaged.. etc have you ever had doubts with the person you’re with? I have been with my man for seven years. A couple months ago he broke my heart and broke up with me and we didn’t really talk for two months. Ultimately we couldn’t stay away and got back together but sometimes I have doubts even though I love him with everything I have ever since the breakup. Has anyone been through this?