Δεν θέλω ούτε η ενοχή ούτε η ζήλια να χαλάνε τις φιλίες μας.

Ούτε ... ούτε means neither ... nor.

So:

• ούτε η ενοχή ούτε η ζήλια = neither guilt nor jealousy

Greek repeats ούτε before each item, just like English repeats neither/nor across the pair.

In this sentence, it links the two things the speaker does not want affecting the friendships.

Η is the feminine singular definite article, meaning the.

• η ενοχή = the guilt
• η ζήλια = the jealousy

Even though English often says just guilt or jealousy without the, Greek commonly uses the article with abstract nouns when speaking generally.

So Greek says literally something like:

• neither the guilt nor the jealousy

but the natural English translation is often just:

• neither guilt nor jealousy

After θέλω (I want), Greek normally uses να plus a verb, not an infinitive.

English:

• I want to go
• I want them to leave

Greek:

• Θέλω να πάω
• Θέλω να φύγουν

So here:

• Δεν θέλω ... να χαλάνε ... = I don’t want ... to spoil ...

The να introduces a subordinate clause, often called the subjunctive construction in Greek grammar.

Because the subject is actually two things together:

• η ενοχή
• η ζήλια

Together they form a compound subject:

• ούτε η ενοχή ούτε η ζήλια

Since the meaning is guilt and jealousy as two separate things, the verb goes in the plural:

• να χαλάνε = to be spoiling / to spoil

Compare:

• Η ζήλια χαλάει τις φιλίες. = Jealousy spoils friendships.
• Η ζήλια και η ενοχή χαλάνε τις φιλίες. = Jealousy and guilt spoil friendships.

This is a very useful Greek aspect difference.

• να χαλάνε = present subjunctive: ongoing, repeated, general
• να χαλάσουν = aorist subjunctive: single event, complete result

In this sentence, να χαλάνε suggests a general or repeated harmful effect:

• I don’t want guilt or jealousy to keep ruining / to be ruining our friendships
• I don’t want guilt or jealousy to spoil our friendships in a general sense

If you said να χαλάσουν, it would sound more like:

• I don’t want guilt or jealousy to ruin our friendships as a single completed outcome

Both can be possible in different contexts, but να χαλάνε fits well when talking about an ongoing tendency or pattern.

Τις φιλίες μας is in the accusative, because it is the direct object of χαλάνε.

• οι φιλίες = nominative plural, the friendships
• τις φιλίες = accusative plural, the friendships as object

So:

• να χαλάνε τις φιλίες μας = to spoil our friendships

The possessive μας means our.

In Greek, possessive forms like μου, σου, του, της, μας, σας, τους usually come after the noun.

So:

• οι φίλοι μας = our friends
• η οικογένειά μου = my family
• τις φιλίες μας = our friendships

That is the normal Greek pattern. English usually puts the possessive before the noun, but Greek commonly puts this short possessive form after it.

Because δεν negates the main verb θέλω:

• Δεν θέλω = I do not want

So the structure is:

• I do not want [neither guilt nor jealousy to spoil our friendships].

Greek usually puts δεν directly before the finite verb it negates.

If you moved the negation elsewhere, the meaning or structure would change. Here the speaker is saying that they do not want this situation to happen.

Greek word order is fairly flexible, but the version you have is natural and clear.

Current order:

• Δεν θέλω ούτε η ενοχή ούτε η ζήλια να χαλάνε τις φιλίες μας.

This puts strong focus on the two negative subjects:

• neither guilt nor jealousy

You could rearrange parts in Greek, but it might sound more marked, more literary, or put emphasis somewhere else.

So for a learner, this is a good natural model to remember.

Because they are abstract nouns used in a general sense.

Greek often uses the singular for abstract ideas:

• η αγάπη = love
• η ζήλια = jealousy
• η ενοχή = guilt

So:

• ούτε η ενοχή ούτε η ζήλια means neither guilt nor jealousy

You do not need the plural unless you mean multiple specific instances, types, or feelings in context.

Yes. Χαλάνε is a very common modern form of the verb χαλάω.

You may also see:

• χαλούν

Both mean they spoil / they ruin.

In everyday Modern Greek, χαλάνε is extremely common and natural. So this sentence sounds normal as it is.

It breaks down like this:

• Δεν θέλω = I don’t want
• ούτε η ενοχή ούτε η ζήλια = neither guilt nor jealousy
• να χαλάνε = to spoil / to be spoiling
• τις φιλίες μας = our friendships

So the pattern is:

• Δεν θέλω + subject + να + verb + object

More literally:

• I don’t want neither guilt nor jealousy to spoil our friendships.

Natural English:

• I don’t want either guilt or jealousy to spoil our friendships.
• I don’t want guilt or jealousy to ruin our friendships.