Cuando estoy cansado, el trayecto en autobús se me hace largo.

Because estar is used for temporary states and conditions, and being tired is a temporary condition.

• estoy cansado = I am tired
• soy would suggest a more permanent characteristic

So cuando estoy cansado means when I’m tired.

Cansado agrees with the speaker’s gender.

• A male speaker would usually say estoy cansado
• A female speaker would usually say estoy cansada

If you are a woman, the sentence would normally be:

Cuando estoy cansada, el trayecto en autobús se me hace largo.

Trayecto usually refers to the route or journey from one place to another, especially a specific stretch of travel. In this sentence, it means the bus ride or trip.

Viaje is more general and often sounds broader, like a trip or journey overall.

So:

• trayecto en autobús = the bus journey / the bus ride
• viaje could sound more like a trip in general

Here, trayecto is a very natural choice because the speaker is talking about the time spent traveling by bus.

In Spanish, en + means of transport is very common for saying how you travel.

• en autobús = by bus
• en coche = by car
• en tren = by train

So el trayecto en autobús means the journey by bus or the bus ride.

Por autobús is not natural here, and de autobús would not normally be used to express the means of transport in this sentence.

Literally, it is something like:

it makes itself long to me

But that literal breakdown is not how we would naturally say it in English. The real idea is:

• it feels long to me
• it seems long to me
• it drags for me

This is a very common Spanish way to talk about how something feels subjectively.

This is part of the expression hacérsele + adjective + a alguien, which means to seem / feel + adjective to someone.

In se me hace largo:

• se is part of the verb structure
• me means to me

So:

• se me hace largo = it feels long to me
• se te hace largo = it feels long to you
• se le hace largo = it feels long to him/her

You should learn this as a set pattern rather than trying to translate each word too mechanically.

Because largo is an adjective describing el trayecto.

The structure is:

[thing] + se le/me hace + adjective

So here:

• el trayecto = the thing being described
• largo = the adjective describing how it feels

Since trayecto is masculine singular, the adjective is also masculine singular:

• el trayecto ... largo

If the noun were feminine, the adjective would change:

• la espera se me hace larga = the wait feels long to me

It is about perceived duration, not physical size.

In this sentence, largo means something like:

• long
• drawn-out
• like it takes ages

So the bus ride feels long when the speaker is tired.

Spanish often uses largo this way with experiences, waits, journeys, classes, days, and so on.

Yes, but the feeling is slightly different.

• se me hace largo sounds very natural for subjective experience: something feels long, drags, or seems to take a long time
• me parece largo means it seems long to me, which is also correct, but can sound a bit more like an opinion or judgment

For experiences like journeys, waits, classes, and days, se me hace largo is especially idiomatic.

Spanish object pronouns have a fixed order. When both pronouns appear before the verb, the indirect object pronoun comes after se in this kind of structure:

• se me hace
• se te hace
• se le hace

So me se hace is not correct.

This is just the normal pronoun order you need to learn.

The subject is el trayecto en autobús.

So the sentence is structured like this:

• Cuando estoy cansado = when I’m tired
• el trayecto en autobús = the bus ride
• se me hace largo = feels long to me

The adjective largo agrees with trayecto, which helps show that trayecto is the subject.

Because Spanish often uses the definite article where English might say the, a, or even nothing at all, depending on context.

Here, el trayecto en autobús refers to the bus journey in a general or understood sense. Spanish commonly includes the article in this kind of sentence.

So el trayecto en autobús sounds natural, even if English might simply say the bus ride or traveling by bus.

Yes, very often. The pattern is extremely useful.

Examples:

• La clase se me hace aburrida. = The class feels boring to me.
• La espera se me hizo eterna. = The wait felt endless to me.
• El día se me hace corto. = The day feels short to me.
• El trabajo se me hace pesado. = The work feels hard / tiring / burdensome to me.

So a very useful pattern to remember is:

[something] + se + indirect object pronoun + hace + adjective

It often expresses a personal impression of an experience.