I have been in your shoes. Several years ago I was an SU demo and had a TON of stamps, plus other stamps from stamp companies. I literally had everything, and then sold it all. I could kick myself. 3 years ago my two dogs died within 6 months of each other and I needed something to keep me busy. I got back into stamping and have a ton of stuff again. Now I'm super busy with my two new puppies and don't stamp a lot. THIS TOO SHALL PASS!!!! I do get some time, here and there, and get to stamp with friends.
First, you will go through this. DO NOT SELL your stuff!!! This will pass.
Second, join a monthly stamp club. This will keep you in the loop of things.
Thirdly, find a great demo, or two, and go to her monthly classes. You will get to make cards, keep you on your toes for when you do get to stamp and you will get to meet new friends.
Hang in there!!! Don't do anything stupid. Keep your stuff. You will do great.
Also, send your cards out... RAK's are terrific!!! People would love to be surprised by your cards. Join the RAK list on here. It's great.