MAGIC BOYS THAT DISAPPEAR

Phoenix
So me and this guy had been seeing eachother. So here's the deal he's 20 and I was his first girlfriend he's very shy and thinks he's "not what girls gush over" and wellI thought everything was going well, there were no warning signs at all. and out of the blue he just messaged me on Facebook and told me it was over and completely cut me off. He had told me that he was scared but since he doesn't want to try talk it through is it possible that he was just using me for sex? Cause he had only done it once prior . I'm still trying to get the answer out of him but I've had no reply but I'm not blocked yet haha. I would just love some opinions because I love honesty and I'm not getting it from him 🙃😞