Am I overthinking it?

I’ve been seeing a guy for almost 2 months. We had been hanging out and going on dates consistently up until the end of March, when he informed me he was going on a trip to Whistler. I saw him Friday March 18th and before we parted ways we planned to see each other the following Tuesday March 22 before his trip to Whistler. Monday night came around and he said he had a last minute change of plans and he was leaving for Whistler the next day until the following weekend. I thanked him for letting me know and told him to have fun. We left it at that and he messaged me a few pictures a few days later on Friday March 25. We exchanged a few messages back and forth but I didn’t think much of it since he was on a trip after all. I didn’t hear from him again until almost a week later on Thursday 3/31. He texted me saying he just got back from Whistler the night before and he wanted to see me before his trip to Oregon the following day. He said he was going to a concert at 7 pm but that I could call him when I got off work. I had plans that evening so I replied saying that I coulnd’t see him tonight but when he returned from Oregon we should get together. He never responded and now I feel like he’s not interested in seeing me again. It’s been almost 3 weeks since the last time I saw him and if he really wanted to see me he would have tried to make plans before hand when he knew he would be back in town. I keep thinking I should have just called him and talked to him, but now I feel like he might feel rejected by me text saying I couldn’t see him. I just don’t know what to think. Help!