As Western society, we are extremely bad at handling grief.
While you are wondering if your pain will ever end, the people around you are desparately wishing you would return to 'normal' because they don't know what to say - that is what motivates your friends' absence rather than callousness. the fact remains though, at a time when you need support, it magically evaporates.
So from the inside out - which is where you are living right now.
The grieving process is long, hard and terribily unpredictable. Some days you will feel relatively OK, sometimes desparate to die and stop the hurt, and all shades inbetween, sometimes changing minute to minute.
People would love you to 'get better' a day at a time - so this week, you are less distraught than you were last week, next week, you'll be better again, and in six weeks, it'll just be a distant memory we don't talk about.
The reality is that grief is not a train on a track, moving forward every day at a steady pace. It's a boat on the ocean, sometimes you have a fair wind, sometimes you are swamped in a storm with no rudder.
You won't 'get over' your loss, but you will learn to assimilate it into your life until it stops being the dominating force and becomes something you can deal with most of, if not all the time.
Give yourself some time, and give in to your grief. Crying is good for you, don't try to stop it. Talk if you need to, be nice and quiet if you don't. Draw the close ones closer, and forget the uncomfortable avoiders.
You will get through this, hopefully without medication, but if your GP advises it, be guided, they know what they are doing.
Keep in touch, plenty of sympathetic friends on here when you need them.