Look forward tosomething means to be pleased or excited that it is going tohappen. The ‘to’ inlook forward tois a preposition, so we must follow it by a noun phrase or a verb in the -ingform:
I’mlooking forward tothe holidays.
A:Are you excited about your trip to South America?
B:Yes, I’mlooking forward toit.
We’relooking forward togoing to Switzerland next month.
Not: …looking forward to go to Switzerland…
If the second verb has a different subject, we use the object form of the pronoun, not the subject form:
We’relooking forward tohim arriving next week.
Not:We’re looking forward to he arriving next week.
We also uselook forward toat the end of formal lettersand formal emailsto say that we hope to hear from someone or expect that something will happen. We use the present simpleform:
Ilook forward toyour reply.
Ilook forward tohearing from you soon.
Welook forward toreceiving payment for the services detailed above.