[TL;DR below]

I(15M) have known this girl(15F, whom we shall call A) since 2011 because we were classmates and had to sit together in class for the first quarter. We were also lab partners for 2 years. We became friends and go to a lot of the same events like parties. Then, I started liking her and eventually told her which she replied with just "Okay ;x". It was kind of awkward since this was my first time confessing and so I couldn't tell her that I thought she was a great person and couldn't show her how much I liked her and I think this is why I got friendzoned. After that, it was awkward. Luckily, it was the last week of school.

The next year, we got less awkward until it became almost normal. However, it felt like she started liking me halfway through the year. For example, when my friend said something about me liking another girl(15F, who was her bestfriend and whom we shall call B), A was looking at me so intently, it seemed like she wanted me to disprove it. She once also seemed like she was talking about me with B. I went to where she sat for lunch one time and then they stopped talking, then after some time went to another table. Then they started whispering to each other while looking at me and started giggling. I don't think they were making fun of me, I kinda thought that A had just told B that she liked me.

However, although A may have liked me, by then I had started liking B. Yes, A may have liked me and I still had a bit of feelings for her but I was not sure. So I thought that I should start moving on. So I started liking B because she was really fun and cute. She also seemed like she liked me because she always laughed at everything I said and always looked at me when she thought I wasn't watching(I also could tell who her crushes were before being told about them, so surely I should definitely know if she liked me right?).

When I started making a move on her, I was determined to show her how much I liked her to prevent the previous failure, even in front of her friends like A and also despite being shy. B started ignoring me though because I think she started losing interest in me maybe because I seemed desperate in chasing after her. It may have also been because A liked me and told B that one time at lunch and so B didn't want to mess with A and I and thus, stopped liking me. But this made me confused and also lowered my self esteem and made me become sorta socially awkward from my view. This social awkwardness made me lessen my interactions with others to prevent them from noticing it and avoiding me because of it. I became depressed because of this.

This continued into 2013. A and B moved to a different class, not because they wanted to though. Both of them stopped talking to me though i believe A's reason was due to the seperation while B was continuing to ignore me. My depression made me eventually have suicidal thoughts in September, which pushed me to stop being depressed, or at least lie to myself that I wasn't depressed. Around this time, I decided to start texting A more. B also seemed to be more amiable to me like when I visited her class to greet her on her birthday. Later in the year, I also greeted A on her birthday and she seemed extremely happy about it.

In 2014, I feel less depressed and less socially awkward. However, now whenever I wave at A, she never acknowledges it. Also recently when I greeted B she replied but acted like she hated me.

ADDITIONAL INFO Now before you ask, I'm not a player, it's just that I could never lose my feelings for A no matter how much I wanted to and no matter how hard I tried while going after B. But I never showed my feelings for A nor chased after or flirted with her, at least not consciously. I have mainly chased after B since July 2012. I am also not trying to make them jealous of each other and yes, I think both of them know that I liked both of them. I actually liked B during the first quarter of 2011 and she knows this.

TL;DR There's these two girls(A and B) whom I liked at different times. They both seemed like they liked me, yet friendzoned/rejected me. B started ignoring me. I got depressed but now I'm sorta back on my feet. B seemed to have stopped. Now in 2014 both of them seem to be ignoring me.

Now here's where I beg you to tell me where I went wrong and tell me why they are ignoring me. Was it because of the time I sometimes avoided others during my depression? Is it because they think I'm toying with them? Tell me why and also teach me how to fix this. Also, it would also be helpful if you told me whether either of them like me. Thanks in advance!