Bhakti is spiritual love and yoga is to unite with God. BhaktiYoga is for all living beings and is not limited to people who call themselves Hare Krsnas.
Actually there is so much tattva (truth) that can be realized, it is truly amazing. If you get a chance please look at http://www.Purebhakti.com and http://www.Bhaktiart.com for more information and if you would like to know more about saints in the past who became breatharian for some time to have darshan of Bhagavan (God) then let me know and I will point the way.