First off, great work with the lighting and mood.
A couple of constructive comments that may help you. The focus is somewhat off, ie, overall a little soft. In portrait photography, it is important that particular facial features be sharp, especially the eyes where naturally we all want to look at. In dim lighting, focusing may be difficult to achieve so some time focusing on the outer edge near the eyes where there's more contrast may be helpful. If these were shot handheld, you may want to bump the ISO up slightly to gain a faster shutter speed which will help account for hand shakes.
Both are compositional strong, with the first one having a little too much negative space on the right...but this is just my opinion. Framing to a closer ration of 1/3 with one eye on the first division would make this image stronger.