Steve and I became soul mates, near-constant companions.是什么意思？

Steve and I became soul mates, near-constant companions.

我和史蒂夫成了知己，几乎时刻相伴。

Steve

abbr. stevedore 理货人，码头装卸工人，装卸公司；

例句
The meeting quickly ended and Steve and I left the room...
会议很快结束了，我和史蒂夫离开了房间。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

became

v. 变为，成为（ become的过去式 ）；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

soul

n. 灵魂，精神，幽灵，人；adj. 美国黑人文化的；

例句
Although he was twice as old as us, he became the life and soul of the company.
虽然他的年纪是我们的两倍，但他却成为了公司的灵魂人物。

mates

n. [英]伙伴( mate的名词复数 )，同伴，（非正式）配偶，（熟练工人的）助手；

例句
The males guard their mates zealously.
雄性动物死死地守护着他们的配偶。

companions

n. 同伴( companion的名词复数 )，[天]伴星(=~star)，（用于书名）指南，同甘共苦的伙伴；

例句
His companions brought pressure to bear on him, urging him to stop wasting money.
他的伙伴们给他施加压力，劝他不要再浪费钱。