It's nice you want to work on your relationship but what does that mean? Doesn't "working on a relationship" stand for having good communication skills and being able to talk openly and honestly? As in, talking about the things that are important to you and your partner? Think of things like feeling loved, wanted, supported, etc and what that looks like to you, what does someone do for example to provide comfort, appreciation, etc. What do you need to feel loved, what does your partner need, where could the both of you improve this?
It's also important to talk about other ideas related to a relationship, what constitutes a serious relationship for example. Do you want to work towards moving in together or do you want to have some conditions met first (for example, the ability to work and have your own income so you're not completely dependent on him when you move). Stuff like that is important so talk to your boyfriend about it.
Being able to work on a relationship sounds great and maybe to you it even is a sign you're really into this guy, but for many this isn't anymore more than something you say to show your commitment. Actually putting in the work, talking together and finding ways to improve things between the two of you, is a whole other thing.
So if you want commitment and a serious relationship that looks like something you want it to look like, then put in the work and don't talk about being willing to work on it. You'll probably get a lot clearer responses from your partner as well.