<human>: Condense the text into a few key points

So I posted here Saturday saying a guy I've been seeing for a while lied about what he was going to do on the Friday (essentially he said he was grabbing a beer with some old friends he hadn't seen in a while and was heading to bed early, but instead went to a huge house party and went to bed at 6AM. I think he lied so I wouldn't ask if I could join) and didn't show up at my place on the Saturday like he said he would. 

He also didn't talk to me AT ALL all weekend, except for one small text on Friday mentioning the beer with friends. I'm okay with not talking every day, but my general attitude in life is that with communication being so accesible in today's society, if someone doesn't talk to you, it's because they didn't want to.

I saw on his Snapchat that he went out for fun activities all weekend, and the thing is, when I bring up something fun to do other than netflix and chill at his apartment on weekday nights, he says he's too tired, doesn't have the money or the time etc because he needs to study. 

Now, I don't mind at all that he went out to have fun with friends! Every relationship needs space. I don't mind not communicating for a couple days, of course. What is hurting me a little however is that he's only out of money, time and energy when I want to do something. He parties and stuff pretty much every weekend, but refuses to go to museums or adventures or even just drinks with me. 

He texted me today to ask if I had a good weekend, and I said yeah, it was fine. Then he just said "lol ok" and hasn't said anything since. I don't want him to think I'm mad at him - it's just that I feel like I'm relevant to him only when he doesn't have anything better to do.

Am I reading too far into this? How should I voice my concerns to him? We haven't been dating for very long (about 1.5 months) and I don't want him to think I'm clingy and just don't want him to see friends.
<bot>: Guy I'm seeing prioritizes everything over me and it's making me feel like he only wants me when it fits him.