Relationship (?) advice needed

Greetings, fellow people of reddit!Some context: I'm a 20 year old student from Greece. I'm gay and I think it's a blessing if anything, so there's no issue with that.I got out of my first proper relationship about 4 months ago. We were together for 1,5 year until things started deteriorating, I was happy with what we had but he never was content so he left. I had a rather hard time getting over that, for my standards, but now I'm alright.Recently, I met a guy who got my interest. He's unusually intelligent and handsome and there was a "spark" between us.Now, it's been ~2 weeks, we've made out a few times and generally we have good communication.However, sometimes he appears as if he doesn't care about all this. I am also a very inapproachable person, but I know what I want. I don't randomly rejectthe other once in a while and leave them to deal with it.Yesterday he had some family problems and I told him "if you ever want to talk, you know I'm here" and he was like "eh, okay". So I replied, "look, I'm just trying to help. I know you prefer doing things on your own, just like I do, but you don't have to. However if I'm just annoying you and you prefer to be left alone, just say the word and I'll back off".So he told me that he "prefers being left alone" and later on he went on to tell me he "doesn't want me getting too attached to him."I told him I'm not going to, but asked why. He told me "he's been disappointed by a few relatonships and he doesn't know where all this is going, so he just wants to have a good time and we'll see about the future".That's fine by me, but I asked "well, that however means there IS a possibility of being serious in the future?" - I can't be in a... thing, where I know for a fact that there will not be any meaningful outcome, ever.And he was like "eh right now there isn't. Maybe later. Let's not think about it".I really got frustrated by all this.I used to feel comfortable with him and be confident in myself and that he likes me, and we're having fun together and eventually falling in love, and now I feel like he's not serious about me at all. Like I'm just a clingy guy that he can have fun with but he doesn't really care, he dictates the pace and the outcome of all this.How do I handle this?Do I just relax and go with the flow? Do I back off?Will he even care if I do?