Grammar is important to me, it may not be as valued to others. If you don't type clearly I will quickly end the conversation. Words are a real thing. They are used for reading and when you cut words in half all the time, it makes the conversation very confusing.
The proper use of too&to helps but that's not a biggie as well as your&you're.
Just a few examples. It's not hard to type that extra one or 2 letters. When you use these words like this regularly throughout conversation- this is my first impression of you. Smart up!