翻译成英语 我以前和他是好朋友 不过昨天和他断绝了关系

楼上的几位回答不错
一般会说:
We used to be good friends, but we just broke up yesterday.
如果一定要有“他”在里面，这样说：
He and I used to be good friends, but we just broke up yesterday.

I was a good friend of him ,but I broke off from him yesterday.

I used to and he is a good friend but yesterday and he severed the relationship between

I used to be friends with him but we broke up yesterday.

I used to be a good friend of him, but I we broke up yeaterday.