Jealous of boys night out

My SO is always out with mates and I'm not invited because it's 'lads night' but his mates are allowed to invite girls but I'm still not invited unless those girls say yes first. The very few female friends I have here all keep making moves on him in front of me so they're not the type of people I want to be around unless I have to be. Is it wrong that I get so upset when he goes out? I never go anywhere without him so I'm just left sat in the house alone😞 all our friends like him more than they like me so I'm only ever invited if he is and sometimes not even then