I feel single...

He is studying for a degree and when not studying he works. I'm fine with that cos it's all for the greater good. However, when he wants to chill out he goes meets his pals for drinks. Sometimes I'm there, sometimes I'm not. And yes, sometimes we go out for dinner, lunch, drinks together. However, I have a problem with fact that when I ask him to join me and my friends he says no blaming study. But yet, he has time to hang out with his pals. Get me? Like this weekend we are meeting his pals for lunch and I asked if he'd come with me to see my pals tomorrow. He said no cos has too much study to do. Ok. Fine. But then it turns out that he's gona meet the lunch crew and ten go on to meet other friends later. I'm invited to everything. But he still won't come out tomorrow cos he initially said he wouldn't be able for two things and now it's cos he has to study. He meets my pals now and then but in my opinion not often enough... Am I being needy or is he just a dick?