Idk what to think...

I've been married for almost 3 years. I have 2 kids with him. I have no doubt in my mind that I love him.... ! But lately, I've been thinking about someone else. And I cannot seam to get him out of my head... I have never cheated on my husband nor do I plan to cheat on my husband. I don't want to have these thoughts ... But they are always there about this other person. It makes my heart break because I know I shouldn't have thoughts about another man....

I don't want to tell my husband, because I know he will get really upset...

I don't know what to do... I am in tears !!