Is it normal to say these things?

you can keep saying it because its amusing...you cant take life seriously or it will kill you. I try to make fun of myself and just do what makes me happy(not gay). Just keep a good sense of humor and do what you feel is right.

If you're using them in the context of referring to things you don't like or are undesirable then you're reinforcing the idea that to be gay is undesirable as well.

I feel like you shouldn't be saying these things because you may be hurting them. Also, you wouldn't want others to say that to you.

Do what you want. It's just a thing people say, most don't mean it. When people say, "Don't be a girl"...or "Alright ladies!" Does anyone stop to think that that is offensive to women? Why is the word bitch never censored when it is a curse word? No one ever uses it in the context of an actual dog.

i don't know man

Fido with foz

Its cool, my school started this thing where we say "Thats so straight" and "No hetero", even the straight kids. its self mocking. It would be more acceptable if you were out of the closet. My advice is use it very sparingly until you come out.

if you're saying these phrases because you don't want people to think you're gay then stop doing it and if you're just saying it because you say its funny and joking around then its okay and get comfortable with yourself and learn more about yourself and you'll find the answer

You've gotta look to you're own moral compass to decide how you joke/interact with people but I'd say that sounds pretty normal given I've been friends with several gay people over the years and have heard them use phrases like that because they though it was funny, ironic?, or liked how uncomfortable it made straight people get. But never to really to people who would truly get insulted or they didn't already know...

Try a finding new, more intellectual ways of insulting people. Not only will they be too stumped to say anything worth while, but it wont affect morals either

You seem guilty from the phrasing of your post so naturally you should quit it before irony & hypocrisy gets to you. And of course, not forgetting that the other party may get annoyed.