The term "I WAN CRSU" is not a well-known word, and it is difficult to determine its meaning or context. However, if we consider each individual word, we can explore synonyms for them separately. "I" can be replaced with "me", "myself" or "one". "WAN" might refer to "desire", "long for", or 'yearn". "CRSU" is unclear, but if we assume it to be "crush", then "admire", "fancy" or "infatuate" could be possible synonyms. It is important to provide clearer information to get more precise synonyms for this phrase.