Puedes decirlo de diversas maneras y ambas quieren decir lo mismo, por ejemplo: Tengo que irme a comer Me tengo que ir a comer Yo me tengo que ir a comer Tendre que irme irme a comer pronto Tengo que irme a comer pronto Muy pronto sera la hora de que tenga que irma a comer

"Tener que + inf." is a fixed expression, which means "to have to + inf.", whereas "tener + nombre" means "to have + noun". I believe that there is no such term "tener + inf.". Regarding "me tengo que ir ...", I would say that the respondent Raùl has provided the best explanation, since the reflexive pronoun "me" comes from the term "irse a", which means "to go away/off". --- Good day. / Que tengas buenos días. / 祝　是日安好。

Yo tengo ir a comer AND me tengo que ir a comer..different? The correct expression is "Yo tengo que ir a comer" and "me tengo que ir a comer" These sentences have the same meaning. There are many ways to express something. In Spanish, it's not necessary to use the pronoun at least you want to emphasize an expression.

the sense its a little diferent cuz Yo tengo ir a comer its about that you want and me tengo que ir a comer its more that you should or someone force you to go to eat for example your friends