I have been working with HTML and CSS for about 6 months now and am still developing my skills in these areas. In some of the courses I have taken I keep running across courses that use Bootstrap. I have tried to learn Bootstrap but it seems to do so you need to pretty much learn a whole new language and it also feels like you are confining yourself - not too sure if that is true but everytime I try to delve into it I feel conflicted from what I have learnt so far. Is it necessary to learn BS to develop websites that are responsive - or is it better to just continue to develop skills in HTML/CSS/ and then move on to Javascript/Photoshop?