Is my boyfriend suffocating me or just being sweet?

My boyfriend is 18, I'm almost 16. because of our age I expect dating to be simple and easy, but lately it's been the opposite. We've been bickering a lot and seem to get annoyed with eachother easily, but we always make up. But when we do, he uses words like "forever" and "in love", which seem a bit heavy after only 3 months. Last night we were talking about why we have relationship problems, and he got sick. He literally puked, and afterwards blamed stress from his dad, job, college..and our relationship. That was a huge guilt bomb, and I felt like I had to make up with him then. Today he found out that his new job isn't what he thought it was; he thought he would be working with computers but it turns out it's a hard labor position in a factory packaging fiberglass. When I told him it would be a bad idea to take it, he said me and our relationship are his motivation for doing it. I feel pressured, guilty, and slightly suffocated now. I can't tell if I'm overanalyzing or if he's crossed the line. Opinions?