The 42154322 between 1515 and 12324 was such a 34253 that I wanted to 3512 it. I admired the 543 with which my 15324 could 1241234532 such it; he would 1421542 and then 421253 his 153324 with such 121 that people would 511254 from all over the 5425 and line the 1545123 to give him 254.
1 is unlikely to be a vowel as no words would make sense for 121, so 2 must be a vowel. The 1st word ends with 22 so 2 is likely to be e. The 2nd letter in 42154322 must also be e.
?e????ee gives repartee as a likely word and then the puzzle solves itself.