Since you are not on any sort of AAS, as aforementioned is suppressive on LH. Low levels of LH is generally associated with pituitary or hypothalamus failure. (Or you haven't recovered from your previous AAS usage). HTPA dysfunction, in it of itself can be from a multitude of pathological causes.
We'll focus on one possibility at a time
Given your body weight of 285 with a mild elevation of prolactin and low LH, can be suggestive of OSA (sleep apnea). Sleep apnea, depending on the severity can lead to HPA dysfunction. In which can cause the symptoms you have described i.e. low libido.
-Are you taking any prescription drugs?
-Is there a possibility that you have sleep apnea?
-Post all of your lab's if you have them.