I hope my sadness lifts your spirits.
If it does say so! It would make me less sad!
(Be honest though)

I'm in my late 20's,
I've only had short "kinda getting close" to being relationships.
But they all fail within a month lol. So my answer is "NEVER"

I've had a hell of a time with it to be honest, and yes.
I feel very very lonely at times too. I can relate to feelings that you probably didn't mention. Feelings that arise from seeing some of your friends find someone that they've been with for 2-3 years, friends that have had a few relationships, etc.

Think about this though, you got out of an abusive relationship that was only 4 months long. Imagine if you had been in that abusive relationship for 2 years? You did well by not even being in it for half a year, give yourself credit for that one.

You made a great decision by getting out of that abusive relationship.
Being single is better than dealing with that. Probably doesn't seem that way, but think about the bad moments of that relationship.

I know it's hard, but still... you did the right thing.