I don't personally want someone to tell me "yes Ashly" all of the time and I certainly don't mind when someone points out what they perceive as a flaw or a problem in something I want to do or in an idea I have. There's a difference between being critical in a helpful sense and being critical in an un-supportive way. Communication is important in so many aspects of life and it bothers me how often people in general don't communicate with each other enough in constructive, positive ways. It's possible to be supportive without just going along with everything because being supportive sometimes means pointing out why something might not work and getting that person to think through everything.
Maybe they're concerned about your safety. That's always something to take into account. Sometimes people don't always take their safety into consideration. I have an impulsive nature and often I just think about how fun and exciting something will be long before the thought of safety enters my mind. I've gotten better about that, though. I also have a boyfriend, family members & a couple close friends who are always on the ready to point out safety concerns with things that I think I might want to try. Sometimes it's not an adventurous fun thing you're trying to do because there are plenty of things where safety needs to be factored in and thought over. If someone is discouraging you from something with reasonable concerns for your safety, listen.
Maybe they think you're wasting your time. It's your time to "waste" so go ahead if it's something you really want to pursue. Just don't forget that no matter how good of an idea you think you have, it is possible that it could lead to a dead end and turn out to be a waste of time. Though I always looks at things as if I learned something valuable in a pursuit that didn't work out, it wasn't really an entire waste of my time.
Maybe they think your pursuit is stupid. They're entitled to their opinion and for me, it's always worth listening to someone else's input as long as they're being respectful because maybe they'll point out something that I hadn't thought of yet.
Maybe they really don't believe in you. In that case, you should probably look at that person and figure out why you're listening to them in the first place.
Instead of just listening to the "oh, you can't do that" and the "yeah, I think that's a bad idea for you" or etc, stop and ask them why they feel that way. There has to be a reason and you should hear that reason. Maybe it will offer a fresh point of view and put things into a fresh perspective for you. Ask and listen.
If there isn't a major safety, moral or legal concern involving whatever your goal is, why are they trying to discourage it? Listen even if there isn't a sensible reason behind their discouragement because that's telling, too.
Just remember, you're responsible for your actions and you're responsible for the things that occur because of those actions. So if you fuck something up, own it. If you fail, own it and don't let a failure discourage you from trying something else. If you try and decide it's not for you, accept that and move on. If you mess up, learn from it, fix what needs fixing and remember what not to do next time. Take the time to think things out, too. There are pros and cons of everything. Sometimes it's tough to do that but never let yourself get discouraged by other people telling you what you can and can't handle, what you can and can't do.