das Interesse
interest
The mental involvement, attention, or curiosity that one brings to a thing or person.
Sein Interesse für alte Autos ist wirklich bemerkenswert.
His interest in old cars is really remarkable.

interest
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interest
The mental involvement, attention, or curiosity that one brings to a thing or person.
Sein Interesse für alte Autos ist wirklich bemerkenswert.
His interest in old cars is really remarkable.

The fixed expression 'Interesse haben an' (to be interested in) is always used with the preposition 'an' and the dative. It expresses what you are interested in or what you want.
Er hat Interesse an einem neuen Auto.
He is interested in a new car.
'Interesse' (interest) is often combined with certain verbs. Common expressions are 'Interesse wecken' (to arouse interest), 'Interesse zeigen' (to show interest), and 'das Interesse verlieren' (to lose interest).
Der Trailer hat mein Interesse für den Film geweckt.
The trailer aroused my interest in the film.
When you direct your attention toward something, you can use the expression 'Interesse zeigen für' (to show interest in). The preposition 'für' is always followed by the accusative.
Sie zeigte schon als Kind großes Interesse für Musik.
Even as a child, she showed great interest in music.
In the meaning 'Vorteil' (advantage) or 'Belang' (concern), the plural 'die Interessen' (interests) is often used. This is typical in political or economic contexts.
Der Politiker muss die Interessen aller Bürger vertreten.
The politician must represent the interests of all citizens.
love
'die Liebe' and 'das Interesse' can both show that you feel strongly drawn to a thing or activity. 'Interesse' is more neutral and means that you are attentive or curious and want to know more or do something. 'Liebe' is much stronger and more personal. You use it when something is very important to you or brings you great joy, for example 'die Liebe zur Musik' (love of music). Learners may confuse the words because you can use both for hobbies. If the enthusiasm is only normal or new, 'Interesse' fits better; if it is deep and lasting, 'Liebe' fits better.

Vor der Reise wächst sein Interesse an der Geschichte des Landes.
Before the trip, his interest in the country's history grows.
Ihre Liebe zur Natur begann schon in der Kindheit.
Her love of nature began in childhood.