Of course you're NOT a failure! The important thing is to think before you eat!
It happens that just this morning I read an article about vegetarians in the newspaper. It said that the only substance you do not get as much as with a meaty diet is iron. All the rest can come as well from a vegetarian diet (incl. milk and eggs- just greens is more difficult). The body of vegetarians however seems to accomodate to the lesser supply of iron, so in adults - even women who nee more iron because they loose a lot every month- it is no problem.

However they recommend to young women to have meat one or two times per week.

I am just like you: I do not want to eat meat but sometimes I like it just too much. So I consider myself as a part-time vegetarian Which means that usually at the weekends I cook myself without meat or with fish. And if I use meat I see that I buy good quality and get also information where it comes from (one of the things that bother me most are animals that are transported over half Europe under horror conditions to be slaughtered - so I see that I can get stuff from local farmers).

I also hope that one day I can be a full-time vegetarian but up to now the thought of a home made burger with fried bacon is just too enticing sometimes