I'm tired of doing it on my own

我不喜欢只身一人的孤寂

Be tired of 厌烦

例句：

Businessmen are tired of politicians talking the economy down.

商人厌烦政客们贬低经济的重要性.

The Beatles—I never get tired of listening to them.

甲壳虫乐队——我是百听不厌.

I am sick and tired of hearing all these people moaning.

我厌倦了听这些人大发牢骚。

On one’s own靠自己的力量，独自地； 独力； 独立；

例句：

Success in study mainly depends on one's own efforts.

学习主要靠自己努力.

Lift a rock only to drop it on one's own toes.

搬起石头打自己的脚.

Uh be on one's own also has many disadvantages, right?

啊.完全自身一个别也有很多缺点的,是吧?

And sometimes we fall in love with people at the wrong time

有时人们会在错误的时间坠入爱情

fall in love with 爱上

例句：

Slowly but surely she started to fall in love with him.

虽然过程缓慢，但她无疑开始爱上他了。

Foreigners unfailingly fall in love with the place.

外国人都爱上了这个地方。

It's my karma always to fall in love with brunettes.

我爱上的总是深褐色头发、浅黑色皮肤的白种女子,这是我的缘分.