How on earth did you determine that you didn’t spend any time together outside of school in only 7 days? If you were only together for 7 days, and I’m assuming you “hooked up” (whatever that means today) then you had school for 5 of those days, had homework each of those nights and then the weekend came and you broke up. None of this even makes any sense.
First of all you weren’t dating him and he wasn’t your boyfriend. Dating means that you go somewhere together, have a mutual understanding that you are “dating” and do something somewhat romantic (like go to the movies, or out to dinner or on a picnic or on a walk, or go to a museum or a party). Just kissing in the hallway at school doesn’t mean that you are dating. He probably had no idea that you were “dating” either.
And since you said, “he’s not the kind of peson to show his feelings” and he “he never talks to me anymore” makes me wonder why on earth you would want to be with someone who can’t/won’t let you know how he feels about you and seems to be un-interested in you? It sounds like you guys had a brief “hook up” and he’s moved on. You should too.
But you should really understand what it means to be in a relationship with a person, to have a boyfriend and to be dating. Being in a relationship with someone means that you both know how you feel about each other and you have a strong bond and that you really like each other and may possibly even love each other. And both parties are respectful of each other’s thoughts and feelings, no one forces the other to do anything they’re uncomfortable with. There’s never any confusion about whether or not you’re actually in a relationship. When you are dating someone, that’s another situation in which both parties realize that they are dating and there are certain expectations and rituals that go along with that (calling each other on the phone and making plans to do something together, going places and sharing meals together, making plans to get together in the future, and then ultimately deciding whether you are dating exclusively or whether you both are dating other people at the same time). Having a boyfriend means that he asked you to be his girlfriend or you asked him to be your boyfriend and there was a mutual agreement based on your affection for each other. Each of these 3 things are clear and obvious to the couple (and usually to their friends and families too). It’s not just something that you say or that you assume.
Now as for how to find out for sure if this particular fellow is still interested in you, you need to call him, write him a letter or walk right up to him (whether you are nervous or not, it doesn’t matter, it has to be done) and let him know that you are still interested in him and that you would like to try dating him outside of school (hopefully that will mean by doing things with groups of other people of your same age, both males and females, NO one- on- one dating at age 14, there’s too much temptation to get intimately physical, a little kissing and hand holding is fine) And your parents and his parents should be fully aware that you are dating and be ok with it, otherwise you are just hooking up and sneaking around.
If you can’t bring yourself to do this, then ask one of your close male or female friends to go up to him and ask him.
If he has no particular answer, can’t articulate his feelings or hems and haws or says something weird or vague, take that as a no. Then move on.