Love crushed

Right ok im 15 :) andd ermm I like this boy who is 17… Ok ill explain from the beggining. My sister went out one night and saw her male friend who really likes her. And they went for a drive and his male friend happend to be in the car… Because he was single,my sister and her lover decided to hook me and the guy up even tho we diddnt know each other..so my sister gave him my number,and I got a text off him sayin we shud get to know each other 1 time…I fort why not? So yer I met him with my sister and her lover and we seemed to get on great… Times passes by and we were starting to fall for each other. And it came to that point where we kept seeing eachother,he helped me get over my ex and we just had laffs and jokes. Then 1 day I went to his house to watch a movie as a double date wiv my sister and her lover,but for some reason I was in1 of them moods where I thaught he was acting off with me… But I found out that he thort I was being off with him so it got arkward..and came to the point where he wanted me to go home…so I got a lift home and we kissed and I thort we were ok after it but then I txted him to say sorry I was being off with you and he was like yer you were…u no just being weird with it but I decided to say ‘’where do I stand’’ (as in do you still like me) he thort I was asking him out in a way and he was like I dont want a girlfriend atm because it seems to last longer nt being in a relationship…I fort ok fair enuff…but ever since then things changed! We diddnt talk when we were out with everybody it was a horrible feeling…but 1 day we sorted it and we boh realised we will just be friends…so we went bowling 1 night again as a double date…and in the middle of the game my sister went out for a fag with her lover…and so me and the guy was alone…he was flirting with me so I flirted back but suddenly we stopped giggling and straight away looked at each other and just started to kiss! I was like omg whats this? Does he like me again. I dont no guys…it confused me but the kiss just happend.and we both liked it..but I found out that he doesnt wana mess me around and just shag me but he wants someone to just ‘shag’ for a bit but as he knows im a virgin he doesnt wana hurt me…so whenever I see him now I want to act like im not jellous he doesnt want me…I him to want me tho as I no ill be right with him,but guys I dont understand…I just dont no what to do… Can anyone help me?does this guy like me or not cause normally he still flirts with me when im with him but I duno if thts just him leading me on or playin me about…I need tips please just advice!!!