leaving my husband

deep down i know i settled wen i married him. there was no one else interested in marrying me. everyone else just wanted me for sex or short term, but he persisted.... wanting to marry me since we met. i think he just wanted me for my job and its advantages. he never shows me his pay, or makes future plans of a house or anything. but i do. i feel used. should i leave him, and keep my fingers crossed for someone better. deep down i see myself growing old alone. i dont want that