Feel like an afterthought in my BFs life, talking to him tomorrow - tips/advice on doing this?

Sorry about the length. My partner and I have been dating for going on 9 months. Lately I've been feeling like an afterthought in his life in terms of seeing each other. He just seems to prefer to make time to spend with his friends e.g. there's an upcoming event that's important to me which he didn't want to go to but then wound up getting tickets to with his friends, he knows I'm not happy about that but it's too late to change anything now.

We live an hours drive from each other and are both busy but so far I'm the only one who makes the commute to spend time together. I don't *think* he wants me to feel this way, I just don't think he realizes how he's making me feel. I don't want to break up with him, I care about him a lot, but at the same time I don't want to be with someone who doesn't want to be with me and make me a priority in their life.

So, I obviously have to talk to hm about this, but I'm not sure how to do so without putting him on the defensive. I want a discussion and to sort this out, not a fight. Tips/tricks/advice on talking about this sort of thing with guys would be much appreciated.
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We had a chat, and he said he didn't realize I was upset and doesn't mind changing around plans with friends to visit me where I am when I'm free, he hasn't offered because he doesn't want to invite himself around and feel like he's imposing. So we'll see how things go.
Feel like an afterthought in my BFs life, talking to him tomorrow - tips/advice on doing this?
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