Breakdown of הם רוצים להתחתן בקיץ, ולכן היא הייתה צריכה לבחור טבעת כבר החודש.
Questions & Answers about הם רוצים להתחתן בקיץ, ולכן היא הייתה צריכה לבחור טבעת כבר החודש.
Because the first clause talks about both of them:
הם רוצים להתחתן בקיץ = They want to get married in the summer
Then the second clause narrows in on the woman specifically:
ולכן היא הייתה צריכה לבחור טבעת כבר החודש = and therefore she had to choose a ring already this month
So the meaning is something like: both partners want to get married in summer, and because of that, she had to choose a ring this month.
להתחתן means to get married.
The prefix לה־ is the normal infinitive marker in Hebrew, similar to to in English:
- לבחור = to choose
- ללכת = to go
- להתחתן = to get married
So after רוצים (want), Hebrew uses an infinitive:
- הם רוצים להתחתן = they want to get married