3 years doesn't matter once you're beyond 21 and she's 18 lol...(jailtime otherwise )
buuut yeah, 16-17 and a 14 year old...ehh that's a bit much....when your young those age gaps are quite a bit.
Vast difference in mentality and maturity not to mention physically....(not that you should be getting physical at freakin 14, although I realize kids these days are getting sexual so freakin early these days)
I'm not telling you how to live your life or what to do, I'm just posting my opinion so dont bother getting all defensive over this post.