How old are you? You sound extremely young.
How long have you all been talking to each other? You stated a long time, but exactly what is that?
You "love him" and you all have never been out together? Hmmm, that's weird. He doesn't even sound like a bf.
If you are having doubts about "this and that" it is probably not the best relationship for you. You stated you are "putting" more into it. I would just assume date around and not be "hung up" on this guy. Find someone better suited for you.
He's not "using" You if all He's done is kiss You when You "meet up like every second weekend". Maybe for Him it's more like a greeting.
If you feel that you are putting out all the effort then back off. How old are you because there is different advice for different ages. If your under 25 move on tho the next one, but don't be a attention seeker, live your life and a man that wants you he will make it well nown and that don't mean he has to be texting or calling you all day to show u that he likes you and that is for any age.
I would say that he either isn't all that into having a relationship with you or he is so young and inexperienced that he has no idea how to be in one.