Η φίλη μου μιλάει για την Ελλάδα με τόση αγάπη, που τη θαυμάζω ακόμα περισσότερο.

In Greek, possessive pronouns like μου usually come after the noun:

• η φίλη μου = my friend
• το βιβλίο μου = my book

Putting μου before the noun is not normal in standard Greek. Greek usually says the noun first, then the possessive.

Also, η is the feminine singular definite article, because φίλη is a feminine noun.

Greek often uses the definite article more regularly than English does. So:

• η φίλη μου = my friend

Even though English does not say the my friend, Greek normally does use the article here. Leaving it out would sound unnatural in a normal sentence.

Yes. μιλάει and μιλά are both present-tense forms meaning he/she speaks or is speaking.

So:

• μιλάει = μιλά

Both are correct in Modern Greek.
Μιλάει may sound a bit fuller or more explicit in writing, while μιλά is also very common.

Here it means:

• Η φίλη μου μιλάει... = My friend speaks / is talking...

The preposition για means about, for, or for the purpose of, depending on context. Here it means about:

• μιλάει για την Ελλάδα = she talks about Greece

After για, Greek uses the accusative case, so η Ελλάδα becomes την Ελλάδα.

In Greek, names of countries very often take the definite article:

• η Ελλάδα = Greece
• η Γαλλία = France
• η Ιταλία = Italy

So για την Ελλάδα is the normal way to say about Greece.

Saying για Ελλάδα is possible only in certain special contexts, but not as the neutral version here.

Literally, it means with so much love.

• με = with
• τόση = so much / such great
• αγάπη = love

Here it describes the way she talks about Greece: she speaks about it with great affection.

The word τόση is feminine singular because it matches αγάπη, which is a feminine singular noun.

Because Greek is using the pattern:

• τόσο / τόση / τόσο ... που = so ... that

So the sentence structure is:

• με τόση αγάπη, που...
• with so much love, that...

The comma helps separate the main clause from the result clause introduced by που.

Here που means that, introducing a result:

• so much... that...

So:

• με τόση αγάπη, που τη θαυμάζω ακόμα περισσότερο
• with so much love that I admire her even more

This is not a relative που meaning who/which/that.
It is a conjunction connecting the idea of cause/intensity to the result.

τη refers back to η φίλη μου — my friend.

So:

• τη θαυμάζω = I admire her

It does not refer to Ελλάδα here. The speaker admires the friend because of the way she talks about Greece.

Greek object pronouns like με, σε, τον, τη, το, μας usually come before the verb.

So the normal order is:

• τη θαυμάζω = I admire her

This is one of the most basic Greek clitic pronoun patterns.
Using θαυμάζω τη would sound incomplete or very unnatural in standard Greek.

Both τη and την can represent the feminine singular object pronoun her.

• την θαυμάζω
• τη θαυμάζω

Both are correct. In everyday Greek, τη is very common before a consonant.
Since θαυμάζω begins with a consonant sound, τη θαυμάζω is perfectly natural.

You can think of τη as a shortened form of την in this position.

Θαυμάζω means I admire.

It comes from θαυμάζω = to admire / to marvel at.

So:

• τη θαυμάζω = I admire her

In this sentence, it expresses respect or admiration for the friend’s attitude and feelings.

It means even more.

• ακόμα = still / even / yet, depending on context
• περισσότερο = more

Together:

• ακόμα περισσότερο = even more

So the idea is:

• I admire her even more
• because of how lovingly she speaks about Greece

Because περισσότερο is comparative: more.

Compare:

• πολύ = a lot / very
• περισσότερο = more

So:

• τη θαυμάζω πολύ = I admire her a lot
• τη θαυμάζω ακόμα περισσότερο = I admire her even more

The sentence is comparing the speaker’s admiration before and after hearing the friend speak this way.

Yes, very much so. A useful pattern here is:

• τόσο / τόση / τόσο + noun/adjective/adverb + που...
• so ... that...

Examples:

• Μιλάει με τόση αγάπη, που συγκινούμαι. = She speaks with so much love that I get moved.
• Ήταν τόσο κουρασμένος, που κοιμήθηκε αμέσως. = He was so tired that he fell asleep immediately.

So this sentence is a great example of a very common Greek structure.