There is a saying that claims that all of the things which are not rational, i.e, make sense, simply do not exist. It is rationality that gives a purpose and meaning to every possible little detail in one’s life, and may even indicate about a larger picture than just that specific detail. With rationality, wisdom can emerge.
For example, as I look upon my room, I can see it is very messy. The fact that my room is messy makes sense - I’m busy with stuff that I view as more important, such as writing this answer. Therefore, the conclusion I came up with from the condition of my room, helped me, even as an instance, to learn about myself and gain an insight which contains meaning.
This is the essence of rationality: every object and its state can indicate about the state of other objects, and so forth. Rationality is like google: a certain sentence or word you may write shall connect you to a web of additional information which are related to the term or phrase you inserted in the search engine.
The same method can apply to your life: saying that your life does not make sense, is like saying your life does not exist. But you do exist: I can know that because you’ve written a group of words that actually make sense and in order. Saying nothing makes sense implies that even your question lacks meaning.
But your question is meaningful, right? If nothing makes sense, why have you wrote this question? According to your logic, even your question is meaningless… But why would you do something meaningful, like asking for words of wisdom to guide you in your way, if nothing makes sense?
You seem to contradict yourself. If asking this question is, like all of the things in existence, does not make sense, you wouldn’t ask this question, as, in practice you seem to want something meaningful as a way to remove your sense… of senselessness.
What I personally find strange, to be honest with you, is those who commit suicide because they lack meaning. If they truly believed that there’s no meaning, why would they commit suicide? The fact that they did something by their own will, regardless of what the deed is, implies that they grant meaning - grant sense to a certain action. That way, they contradict their argument!
Even saying, as instance, that Facebook is useless and removing one’s account from it, contradicts the saying that Facebook is useless: the person just grant meaning to an action on Facebook - he grant usefulness of removing his account, which is an option in that network.
Excuse me for looking at suicide with such a cold, unemphatic way, but I believe it is necessary not only to save you from falling to the depths of despair, but to also make you understand your self-contradiction. At the same time you wrote this question, you could have, in the same time, make other decisions, regarding the belief that nothing has sense. If nothing had no sense, you could do any other thing instead of asking for help.
And at the same time, every action you could’ve done instead of writing your question would be as meaningless as your question, theoretically, is!
But no, because even though you assume that nothing makes sense - you have still decided to write this question, instead of doing plenty of other things.
Therefore - your logic is false. Even reading my answer is an indication that it makes sense, because by reading those very words, you grant sense to something. Even if you think that my answer does not make sense, you did grant sense to your disagreement, which is an action that is a thing.
Who am I to tell you what makes sense and what not? I can grant a meaning to something, but, at the same time, the meaning I just granted wouldn’t be meaningful to you.
Therefore, not only that everything in existence makes sense (they all have origins, functions, reasons and indication to a bigger picture, not religion necessarily), their meanings are chosen by those who beholds and inspects them.
No one drives the train for you. You are in charge of your train, and only you, upon contemplation, can decide on which track to navigate your transportation - and which track is to be avoided.