What options do I have if my boyfriend of 7 years and I would like to get married and settle in the US but we have very little money?

Best wishes with your marriage plans. Be aware, however, that there may be advantages to applying for your fiance to get a fiance visa to enter the U.S. and marry you here, and then pursuing a marriage-based adjustment of status application, rather than to marry in India and then pursue consular processing. Beyond that, be aware that if you do not have sufficient documentable income to meet the Affidavit of Support requirements, it may be necessary for include a joint sponsor in the application process. Generally, a joint sponsor may be any U.S. citizen or Permanent Resident who has sufficient documentable income and who is willing to assume the responsibilities contemplated for the Affidavit of Support. It would be wise for you and your fiance to consult with an immigration attorney who, after learning all of the relevant information, could advise about eligibilities, options and strategies to attain your goals, and who then could offer legal representation in the often complex application process.