@aShMaRiE95,
If you are not sure that you are in love with him, the chances are excellent you are not.
Wanting to love someone can't make it happen.
If you separate and you return to him, it won't be because you love him, but because you are used to him and you want to have someone you can say you love.
You are only 17. There are lots of other guy who can romance you.
Don't make the mistake of confusing infatuation with love.
Do yourself a favor and think about the future. You won't alway be young and there' a good chance you'll have kids. What you like now may be a horrible mistake in the future.
Find someone who you can love and with whom you want to have as a true partner for the ret of your life.
Don't settle short.