Jealousy is crazy

I just don't understand why someone would be jealous. Jealousy is pointless. It changes nothing and just makes the jealous person miserable. This is clearly seen with Hedda. She somewhat stresses over the fact that Lovborg and Thea have a relationship going. Hedda spends a lot of time being rude to Thea, I think, because she is jealous of Thea. This is ridiculous. Hedda gets Lovborg to drink again because that was one of the things Thea had got him to stop doing. In addition, I believe that Hedda burned Lovborg's manuscript because she knew Thea helped him write it. What do you think about that? LOL She's jealous. That's funny.