Мы совсем недавно познакомились, но уже часто общаемся.

Познакомились means got acquainted / met each other for the first time. It is about the start of a relationship, not just physically seeing someone.

So:

• Мы познакомились = we met / we got to know each other
• Мы встретились = we met up / we encountered each other

You can встретиться with someone you already know, but познакомиться is specifically about becoming acquainted.

In this sentence, the speaker is emphasizing that the relationship is new, so познакомились is the natural choice.

The -сь is the short form of -ся, the reflexive ending.

In познакомиться, it helps form the meaning to become acquainted. With мы, it often has a reciprocal sense:

• Мы познакомились = we got acquainted with each other

So it is not just a random ending; it is part of the dictionary form познакомиться.

A useful thing to remember:

• познакомить = to introduce someone
• познакомиться = to get acquainted / to meet each other

Because the sentence talks about two different time frames:

• познакомились = a completed event in the past
• общаемся = an action that is happening now, as an ongoing or repeated situation

This is a very common Russian pattern:

• first, a one-time finished event
• then, a current repeated activity

So the sentence structure is basically:

• We met recently
• but now we already communicate often

This is an aspect question.

познакомились — perfective

The verb познакомиться is perfective because meeting/getting acquainted is seen as a single completed event. You either became acquainted or you did not.

общаемся — imperfective

The verb общаться is imperfective because it describes an ongoing, repeated process: communicating, staying in contact, interacting.

So the aspect matches the meaning:

• perfective for a completed event: познакомились
• imperfective for a regular activity: общаемся

In many contexts, совсем can mean completely or entirely, but here it works as an intensifier with недавно.

So совсем недавно means:

• quite recently
• very recently
• only recently

It does not mean completely recently in any literal sense. This is just a natural Russian expression.

Examples:

• Я совсем забыл. = I completely forgot.
• Это было совсем недавно. = That was very recent / only a short time ago.

So the meaning of совсем depends on context.

You absolutely can say Мы недавно познакомились. That would simply mean We met recently.

Adding совсем makes it stronger. It emphasizes that the meeting happened very recently.

Compare:

• Мы недавно познакомились. = We met recently.
• Мы совсем недавно познакомились. = We only just met / We met very recently.

So совсем adds emphasis.

Уже usually means already, but in sentences like this it often carries a sense of surprisingly soon or so soon after that.

Here the idea is:

• We met only recently,
• but we already communicate often.

So уже highlights the contrast between:

• how little time has passed
• how frequent the communication already is

That is why it pairs well with но.

Russian word order is flexible, but this order sounds natural:

• но уже часто общаемся

It puts the emphasis like this:

• но = contrast
• уже = already
• часто = often
• общаемся = communicate

So the sentence builds the idea step by step:
but already often communicate

You may also hear slight variations depending on emphasis, for example:

• но часто уже общаемся
• но общаемся уже часто

But но уже часто общаемся is smooth and idiomatic.

Yes, Russian often omits subject pronouns because the verb ending already shows the person and number.

So both are possible:

• Мы совсем недавно познакомились, но уже часто общаемся.
• Совсем недавно познакомились, но уже часто общаемся.

The version with мы is a bit clearer and can sound slightly more explicit or contrastive. In many real conversations, Russians do omit мы if the subject is obvious.

Общаться is broader than говорить.

• говорить = to speak / to talk
• общаться = to communicate / interact / stay in touch

So часто общаемся suggests an ongoing relationship: messaging, talking, interacting regularly.

If you said часто говорим, that would focus more narrowly on actual speaking.
Часто общаемся sounds more natural for a general relationship context.

Not in this sentence, because the people involved are already the subject мы.

Normally, the verb познакомиться often appears with с + instrumental:

• Я познакомился с Анной. = I met Anna / I got acquainted with Anna.

But here the subject is plural and reciprocal:

• Мы познакомились. = We met each other / We got acquainted.

So no extra phrase is needed.

Usually not in the same way.

• недавно = recently
• только что = just now

Только что usually means something happened very, very recently, often moments ago.

So:

• Мы недавно познакомились = We met recently.
• Мы только что познакомились = We just met.

In your sentence, совсем недавно fits better because the second half says they now communicate often. That suggests some short time has passed, but probably not literally just a moment ago.

Yes, it is very natural.

It has a common and idiomatic pattern:

• a recent completed event
• followed by a contrast
• then a present ongoing result

That makes it sound smooth and realistic:

• Мы совсем недавно познакомились, но уже часто общаемся.

A native speaker would understand it immediately, and it sounds like something people really say.