My friend with benefits..He gets jealous & mad if I'm talking to other men..Do you think he wants more?

I want to know...why do men get jealous..Does it mean he has to care more about me then he's willing to admit? or could it be he wants to be free but wants me all to himself? He is 44 years old & I am 36 years old..We have been friends with benefits on & off again for 4 years. He gets jealous &... Show More

I need more opinions please!