Trying to get my Libra ex back, What should I do

I am a Libra myself and 2 years ago I went this Libra man. We are both same age.

It was his first serious relationship and it lasted almost 3 years. I broke it off as I was stupid. I did not appreciate what I had. He was so good and consistent. it came across as boring for me at the time as I was in college and as you know.. College party life consumed my life and got the best of me.

I knew the break up was hard for him as we didn't stop talking until 3 months after I broke it off with him.

Me being foolish and stupid at the time, I've moved on quickly and ended up with another guy.

Who eventually cheated on me. I think it was Karma for sure.

Anyhow, long story short. He moved on too. It took him awhile but he ended up going out with another girl.

When he found out my new boyfriend broke it off with me and cheated on me the day I decided to move out.

He came over and helped me move as friends. He wasn't trying anything as I hope he would.

Anyway, I become single since last year and I messaged him few times just to see how things were. He's happy most of the time and replied back to me every time. As time goes by I knew he doesn't have any interests in me anymore as he was happy in his new relationship.

So I wished for us to be friends but we couldn't as he was going out with someone else and I respected that and never talked to him since.

3 weeks ago our mutual friends have informed me that he just became single. so I was concerned as he's such a nice guy. I texted him and asked how he was. He said he's going through tough time as his granddad is sick so he'll be busy for awhile trying to spend time with him.

I asked if he wanted to see me and he said he was busy.

I think he hates me but he really was the best thing in my life.

No one can lived up to him and I really have tried messaging him but I don't think he cares anymore.

What should I do ?