My mom said I should try being a vegetarian?!

I would be honest with her and tell her what you really think. You are already a "vegetarian" at her house and that should be enough. Personally I think it's better to be honest now than be "caught" as a liar later on which might result in some arguments that you said you are trying to avoid in the first place.
But really it's all up to you.

You're very considerate to consider that she's grieving for your father.

I'd say it's up to you. If she's not pushing you toward vegetarianism in a controlling manner, you might agree to give it a try. I mean, you don't have to do it forever. Eat her food, talk to her, give it a try and then just tell her it's not for you (if it's not). There are three times as many ex-vegetarians as current vegetarians in the US, so chances are she'll give it up sooner or later.

just go along with what she eats at her house and don't complain but outside of there do as you usually do ( eat what you want to eat) tell her that you understand and appreciate that she wants some changes in her life but you are happy and feel you are healthy with your own lifestyle. Tell her that you will support her in her changes but you hope that she will do the same (support and understand) the life you want to live

I will advice you try it out. You never can tell, you might like it and feel good being vegetarian. If it doesnt work for you then you can always go back to yout normal diet and if your mom ask you, just let her know it is not working for you.
You can become a lacto ovo vegetarian (includes eggs and milk, not as much restrictive as being a vegan)
Give it a try and see how it goes
Goodluck

Vegetarian for 6months

I think it is wrong that your mother is trying to force vegetarianism on you. If you are interested you should get your mum to asist you in researching it and then make a choice afterwards.

Has she explained her reasons for wanting you to convert?

vegetarian

well its your choice. best handle the situation and just say "mom, i'm no trying to offend you or anything, but to be honest vegetarianism just isnt for me." and just let her know that you support her in her decision to be vegie.

its up to you, tho i think theres no harm trying it, try it a while and if you really dont like it then have a talk to her about it but at least you can tell her you tried.

I agree we all do vegetarian, so many of the world will not become extinct animals

its better to try if u can.

try it, why not?

Simply tell her that, while vegetarianism is a great lifestyle choice, it's just not one you'd like to make you own. However, tell her you'd love to eat with her occasionally and try some new vegetarian recipes. -- some of them are really great!
It might even help if you tried looking up some online, seeing what looks good, and trying them yourself. It would show her you're making an effort.
You shouldn't feel obligated to change a huge part of your diet, and it certainly isn't healthy if it's not something you want.

Hope I helped!