How serious is he about us?

Met a guy online.. known eachother for over 4 weeks. I've slept at his a lot, he makes me very welcome and also cooks for me. He's asked me if I'd like to go to Spain with him over December. He's told his friends about me. I'm invited to his friends events also. He cancelled helping a friend because I wasn't available that weekend. He bought flowers in his flat when I didn't see him for a few days. How serious is he about us.. I'm afraid I'm gonna mess this up somehow cause I really like this guy. I miss him loads when I'm not at his. My family is going through a lot so I'm spending time at home with them. I know it's healthy to have time apart from him also, we all need space. We haven't really been on dates. He cooked for me the 2nd time we met, at his place. We have spent so much time together since and it's almost like we're skipping the dating part. I don't want this to end, I'm really falling for him.

How serious is he about us?
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