Is this just a phase or something more??

So bare with me on this one, this could sound confusing
So I was born female and I feel comfortable being female on the whole, however some times I really want to look like a man, like I see a guy and think 'I want to be him' or 'I want to look like him' or sometimes both. When I see a good looking guy I can get very jealous/envious of him (I'm sure many people are envious of good looking people haha) but when I see a good looking woman (whose my type) I'm attracted to her and not at all jealous. It's different in a way, as I know girls who compete with other girls to try and look the 'prettiest' but with me I don't feel competitive with girls but competitive with boys. Now I can also be extremely girly too because I equally love dressing up in dresses and wear make up because it's fun but I also really want to dress up like a guy and walk around in public because well.... I think I would feel more comfortable and I also think that guy's clothing looks good. However when I spoke to some of my friends they said that I 'wouldn't be able to pull it off or make a convincing guy because I am too feminine and look too girly'. I don't get much time to dress up like a guy (my parents buy me very girly clothes and I did once ask my mum if I could get some guy clothes but she told me the fit would be all wrong and it would be a waste of money, which is fair enough) when I do I feel better, in a way.
I must state that I do identify as female as I don't think (in this moment in time, things might change, who knows?) I want to actually live as a male (the idea of me actually living as man permanently kind of scares me). Now I know I have stated that when I see a guy I sometimes 'want to be him', what I mean by that is I do want to be like a guy but not permanently as I like being female (sorry if that didn't make sense).
Am I just someone who likes to cross dress? Is it merely just a phase (I am only 17) or something as basic as fashion trends? Or could it be something more? :help:
I'm very confused right now Thank you for reading

 

Thanks to everyone who has replied
This part of my message is in response to kiMMy23 First of all thank you for responding and sharing your experiences, I found it very informative and helpful To answer your 'How women judge the men they see on the street' part is going to be quite difficult because each woman will feel differently about it. Personally, I don't tend to notice guys much on the street but depending on the situation or where I am this could be different. Say for example, I was alone on the street and it was getting dark, I would naturally become cautious of anyone (irrelevant whether they were a man or woman) because of the situation I was in, however if it was daytime and I was with someone or people were around, I wouldn't bat an eyelid at anyone. Some women may be cautious all the time when they are out whether it's dark or not because, unfortunately a lot women feel the need to become wary, we don't feel safe so we are always on guard. I remember when I was on a trip to London about a year ago with a friend and before we went we were given 'tips' about how to survive London, what I mean is we were given self-defense lessons. Now I'm not saying every man on the street is out to get us because that is not true, most guys are great and that's a fact and sometimes it's women who are the threat, but I think woman tend to feel more cautious than anything else. If a woman gives you a look of distrust, I wouldn't take it personally as she is probably cautious of everyone (if that makes sense :S ).

I hope this has answered your question well enough. Also thank you again for responding and I wish you well and I hope you have a good day. Please feel free to respond or message me whenever .

Now this part of my message is in response to Tai's message I personally wouldn't describe myself as 'butch' because if you ever saw me or met me, I am no where near butch hahaha. However I do understand why you may of come to that conclusion because of my earlier message, however I don't think it's quite as simple as just labeling me as one thing or another (I wish it was it would make life easier haha). The thing is, when I'm feeling girly, I am very girly and I enjoy wearing women's clothing because I am a woman hahaha however when I see a guy looking stylish or I'm not feeling particularly girly, I enjoy wearing men's clothing (though I don't get many opportunities to wear guy clothes sadly) and I sometimes wish/want to be a guy, however I don't think I would personally want to be a man permanently.
I'm sorry if sounds stupid and confusing also sorry this message is so long hahaha

I hope you all have a good day and thanks again for replying