Jealousy? Lonelieness? Dependent?

Hi everyone. I just recently started seeing a very nice guy and we both told eachother that we loved eachother. When he goes out with his friends I get a sort of arragement of emotions such as jealously, anger, anxiety, etc. My heart starts racing when I find out that he has plans with his friends to go out like to bars etc. I feel like I don't have the same arragement of my own friends to do that with. Nobody really ever asks me to go out. I get so upset, short and indifferent with him the days that follow him going out. I don't know what it is that I'm feeling but I shouldn't care what he does? Help me. I don't want to lose him but at the same time how can I feel these feelings when I supposedly love him?