Strike up sth (with sb): to begin a friendship, a relationship, a conversation, etc (与某人)建立友谊，开始来往，交谈起来

He would often strike up conversations with complete strangers. 他爱和更本不相识的人攀谈。

keep to yourself also keep yourself to yourself : to live a very quiet private life and not do many things that involve other people 离群索居，不与别人来往，不管别人的事

Nobody knows much about him; he keeps himself very much to himself.
谁对他都不太了解，因为他很少和人交往。

Scenery: 风景,景色
The mountain scenery is majestic.
这山景十分壮丽。