To speak about relationships between people, you need the appropriate vocabulary.
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.
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.