Με τη φίλη μου νιώθω πιο άνετα όταν μιλάω ελληνικά.

It means with my friend.

• με = with
• τη φίλη = the friend in the feminine singular accusative
• μου = my

So Με τη φίλη μου is literally with the friend of mine, which is the normal Greek way to say with my friend.

Because με takes the accusative case.

• Nominative: η φίλη = the friend as the subject
• Accusative: τη φίλη / την φίλη = the friend as the object of a preposition like με

So:

• Η φίλη μου μιλάει ελληνικά. = My friend speaks Greek.
• Με τη φίλη μου... = With my friend...

Also, the full accusative article is την, but the final -ν is often dropped before certain consonants, so τη φίλη is standard here.

It can mean either, depending on context.

• φίλη specifically refers to a female person
• So it can mean female friend
• In some contexts, it can also mean girlfriend

Without more context, many learners should understand it simply as my female friend. If the speaker means a romantic partner, context usually makes that clear.

Because Greek usually puts these short possessive words after the noun:

• η φίλη μου = my friend
• το σπίτι μου = my house
• οι γονείς μου = my parents

This is the normal pattern in Modern Greek. English says my friend, but Greek says something closer to the friend my.

Because Greek often leaves out subject pronouns when they are already clear from the verb ending.

• νιώθω = I feel
• μιλάω = I speak / I am speaking

So Greek does not need εγώ here. If you add εγώ, it sounds more emphatic:

• Εγώ νιώθω πιο άνετα... = I feel more comfortable... with emphasis on I

νιώθω means I feel, and it is very natural in this sentence.

So:

• νιώθω πιο άνετα = I feel more comfortable / more at ease

A close alternative would be αισθάνομαι:

• Με τη φίλη μου αισθάνομαι πιο άνετα...

That also works, but νιώθω is very common and everyday.

Because άνετα is very commonly used in an adverb-like way after verbs such as νιώθω to mean comfortably / at ease.

So:

• νιώθω άνετα = I feel comfortable
• νιώθω πιο άνετα = I feel more comfortable

You can also hear an adjective form:

• νιώθω πιο άνετος if the speaker is male
• νιώθω πιο άνετη if the speaker is female

But νιώθω πιο άνετα is extremely natural and common, and it avoids showing the speaker’s gender.

πιο makes a comparison. It means more.

• άνετα = comfortably / at ease
• πιο άνετα = more comfortably / more at ease

So the speaker is comparing situations: with this friend, they feel more comfortable than in some other situation.

Because Greek often uses the present tense for general, repeated, or habitual situations.

Here, the meaning is not one single event. It means something like:

• whenever I speak Greek
• when I’m speaking Greek
• when I speak Greek in general

So both present-tense verbs are natural:

• νιώθω = I feel
• μιλάω = I speak

This gives the idea of a regular experience, not a one-time event.

Because after μιλάω, languages are normally used without an article.

So Greek says:

• μιλάω ελληνικά = I speak Greek
• μιλάω αγγλικά = I speak English
• μιλάω γαλλικά = I speak French

This is similar to English, where you also say I speak Greek, not I speak the Greek.

In Greek, names of languages are usually not capitalized unless they begin a sentence.

So:

• ελληνικά = Greek
• αγγλικά = English
• ισπανικά = Spanish

It looks plural because these language names are often in a neuter plural form. That is just the normal Greek way of naming languages.

So μιλάω ελληνικά is simply the standard way to say I speak Greek.

Greek word order is fairly flexible. The original sentence is perfectly natural, but other orders are possible.

Original:

• Με τη φίλη μου νιώθω πιο άνετα όταν μιλάω ελληνικά.

This puts Με τη φίλη μου first, which highlights with my friend.

Other possible orders include:

• Νιώθω πιο άνετα με τη φίλη μου όταν μιλάω ελληνικά.
• Όταν μιλάω ελληνικά, νιώθω πιο άνετα με τη φίλη μου.

The basic meaning stays the same, but the emphasis shifts slightly depending on what comes first.