Je pense que je tombe pour toi in French means "I think I am falling for you" in English.
This is not really French, but a translation for 'that you could be falling for your best friend'.
for
"pureté pour toujours" mean "purity forever" in English.
we think of you - you are unique for me
"Pour moi" means "for me" in French.
Pour commencer means 'for a start, ...'
Ensemble means together pour means for.
for who in an invitation
tout pour moi means 'all for me' in English.
"Pour la dernière fois" means "for the last time" in English.
The French phrase "amitié pour toujours" translates as "friendship for ever" in English.