Someone please help!!

(I wasn't sure where to post this so hopefully this is the correct group!)

I have recently split with my fiance of 3 years and 3 months. We split on Halloween night and just kinda stayed friends but have recently had a falling put where I wanted to get back together and he didn't. To each their own.

As for him, he found someone to reflect his loneliness on too and has been texting her...a day after he spent the night with me. I on the other hand didn't.

I already have depression and it seems to just be getting worse, I don't really find joy in anything and everything is just boring. I sleep alot, I work at home, and I might be losing another close friend very shortly because of something that happened over the weekend (store for another time 😓).

For those of you who got out of a long term relationship:

1. How did you move on?

2. What did you do to move time along?

3. How did you cope with things being different?

4. What should I do?

I feel like I won't ever feel this way again for another person because I put my whole heart into our relationship and I already promised to live the rest of my life with this man....

It Christmas and I'm not feeling any joy whatsoever. Please help! I lost my bestfriend who I used to talk to all the time and hung out with almost every day, I have no clue what to do. I just feel empty...

Also- this is my first relationship (his second but his 1st only lasted maybe 2 months). We got together when we were both 16 (August of 2015)