صديقتي في الجامعة الآن، وأنا أنتظرها في المكتبة.

صديقتي means my female friend.

It is made of:

• صديقة = a female friend
• ـي = my

When ـي is added to صديقة, the ة is pronounced as t, so:

• صديقة → صديقتي

This is very common in Arabic. Compare:

• صديقي = my male friend
• صديقتي = my female friend

In Arabic, the verb to be is usually omitted in the present tense.

So:

• صديقتي في الجامعة الآن literally looks like:
• My friend in the university now

But it means:

• My friend is at the university now

This kind of sentence is called a nominal sentence in Arabic. In the present tense, Arabic often just puts the subject and the description together without a separate word for is.

If you wanted past tense, you would usually need a verb such as كانت:

• كانت صديقتي في الجامعة = My friend was at the university

It can correspond to at the university in natural English.

The preposition في literally often means in, but with places it can also be translated more naturally as at, depending on context.

So:

• في الجامعة = in the university / at the university
• in this sentence, at the university is the most natural English meaning

This is a good reminder that Arabic prepositions do not always match English prepositions one-for-one.

الجامعة means the university.

Arabic often uses the definite article ال in places where English may use:

• the university
• university
• college
• at school depending on context

So في الجامعة can be a normal way to express at university.

If you said في جامعة, that would usually mean in a university or at a university, which sounds more indefinite and less specific.

أنا is not strictly necessary here, because the verb أنتظر already tells you the subject is I.

So both of these are possible:

• وأنا أنتظرها في المكتبة
• وأنتظرها في المكتبة

The version with أنا adds a little emphasis or clarity, especially after و:

• وأنا = and I...

It can help make the contrast clearer:

• My friend is at the university now, and I am waiting for her in the library.

So أنا is optional, but very natural.

أنتظرها means I am waiting for her or I wait for her.

It breaks down like this:

• أنتظر = I wait / I am waiting
• ـها = her

So:

• أنتظرها = I wait for her

The ending ـها is an attached object pronoun referring to صديقتي, which is feminine singular.

Because Arabic uses the verb انتظر differently from English.

In English, we say:

• wait for someone

But in Arabic, انتظر normally takes a direct object:

• أنتظرها = I am waiting for her
• literally closer to I await her

So you should not expect a separate word matching English for here.

This is a very common thing when learning Arabic: the verb pattern may not match English exactly.

It can mean either one.

In Modern Standard Arabic, the imperfect verb form often covers both:

• simple present: I wait
• present progressive: I am waiting

Context tells you which one is meant.

Here, because the sentence includes الآن (now) and describes a current situation, I am waiting is the most natural translation.

Because it refers back to صديقتي, which is feminine.

In Arabic, pronouns must match the gender and number of the noun they refer to.

So:

• صديقتي = my female friend
• أنتظرها = I am waiting for her

If the friend were male, you would say:

• صديقي في الجامعة الآن، وأنا أنتظره في المكتبة.
• My male friend is at the university now, and I am waiting for him in the library.

المكتبة means the library.

Like الجامعة, it has the definite article ال.

So:

• مكتبة = a library
• المكتبة = the library

In this sentence, في المكتبة means in the library or at the library, depending on how naturally you want to phrase it in English. In the library is the most direct translation.

Yes, الآن (now) is fairly flexible.

In this sentence:

• صديقتي في الجامعة الآن it naturally comes at the end of the clause.

But Arabic can also allow other placements, such as:

• الآن صديقتي في الجامعة

The original version sounds very natural and straightforward. For learners, it is a good model:

• subject
• place phrase
• time word

So:

• صديقتي = my friend
• في الجامعة = at the university
• الآن = now

It has two coordinated parts joined by و (and):

1. صديقتي في الجامعة الآن

   • صديقتي = subject
   • في الجامعة = prepositional phrase
   • الآن = time expression

2. وأنا أنتظرها في المكتبة

   • و = and
   • أنا = I
   • أنتظرها = am waiting for her
   • في المكتبة = in the library

So the sentence combines:

• a nominal sentence in the first part
• a verbal sentence in the second part

That mixture is completely normal in Arabic.