Problems with some girls?

So idk how this mess all started and how to end so i need some serious help!! So i was talking to this girl who was in my grade. i had been talking to her for a few weeks but i didint really like her. Well my bff little sister was really attracted to me and was two grades bellow me. I started to like her. Well so i texted her once in a while and i said i liked her but things just couldnt work out now because your brothers my bff and my sister was bf with her. I talked to me buddy and he said wate till she was older. So i told her this but she got upset and said okay but asked if we could still text, so i said yess. Well her other bf i got attracted to and started to like. Well she asked me if i liked her and i said i sort of did but im still talking to this girl who was in my grade. So everything was fine this girl texted me sometimes so did my the younger girl but we wer just friends. A few nights later they talked about this and started yelling at me and said i couldnt this. I never cheated or did anything wrong to either of them but they call me a player now and wanna be friends but they said they cant trust me. We still talk sometimes but after awhile i really talked to them about this and appologized and they got over it. But days later they say your a jerk and this cant just end like this. And theey keep saying it cant end like this. And i want to be friends with both of them but they keep getting so upset and try to talk to them but they just dont seem to understand from my viewpoint i didnt do anything wrong and the younger girl tells the other girl lies and i told her we couldnt date and had to wate till she was older and maybe we could but she just never recalls us talking about. and the other girl doesnt know who to believe and is just mad. Though i am still with this in my grade wer dating now and these other two wont get over this i need some serious help!!!