To speak about relationships between people, you need the appropriate vocabulary.
 
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To drift apart - to become less close to someone;

To enjoy someone’s company - to like spending time with someone;

To fall head over heels in love - to start to love someone a lot;

To fall out with - to have a disagreement and stop being friends;

To get on like a house on fire -  to like someone’s company very much indeed;

To get on well with -  to understand someone and enjoy similar interests;

To get to know - to begin to know someone;

To go back years - to have known someone for a long time;

To have a lot in common - to share similar interests;

To have ups and downs -  to have good and bad times;

A healthy relationship - a good, positive relationship;

To hit it off - to quickly become good friends with.
 
Examples:

I really enjoy his company. He is a very interesting person.

She gets on well with her brother.

In our relationship we had ups and downs.
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