Let me preface by saying: I am unsure if I have any mental illness. I've gone to a psychologist and she said that I show signs of social anxiety, although I'm not diagnosed.

The beginning of 2019 was great for me. I was very happy and having a great time. I had started university in September 2018 and although stressed with my studies, I was finally comfortable in my course, I felt confident in my skills, I found a group of friends I felt I belonged with and started dating an incredible guy! Everything was great!

As time progressed however... Things started to change.
I started having problems with my dad (who is divorced from my mom and doesn't live with us) and we went no contact for close to 6 months;
I started doubting myself and my abilities (I tried to get a summer job and went to interviews but no one accepted me);
I was having trouble concentrating on studying for my driver's license (my country requires you take a written test about driving rules and only then do you start driving practice);
I felt self-conscious about my appearance more than I had been in a while (I have always been insecure about my body and weight and had lost quite a few pounds during the summer of 2018 but started gaining a lot of weight again and fast)  
And finally, I was bored of everything and everyone and just felt like pulling away. I wanted to not have contact anyone, not even my boyfriend, (I felt at peace when alone at the house and got extremely stressed when my mom would come home from work). My patience had also decreased and I was getting irritated easily at small things. It felt like I was either apathetic or irritated, no in between. 

I figured it was just because it was summer and I was lacking the uni work and constant studying since it was kind of an outlet for my bad mood and was missing my university friends... But soon, the second year started  and these things didn't go away.
I kept feeling bored, apathetic, irritated and wanted to get away...

During the start of uni, me and my dad started talking again,;
I passed my driving written exam with flying colors and the driving practice was going very well;
Me and my boyfriend were getting along great and barely fought;
And, I was back with my friends, back on the studying routine...

The feelings should have gone away... But they started getting worse. I started feeling empty... Almost as if I had no emotions and no feelings. I still cared about people of course, I still felt upset, I still cried, I still laughed when I found something funny, I still got angry when someone wronged me... But if nothing caused a reaction from me and I was just like sitting on the couch watching TV, I felt apathetic and senseless.

In the last couple of weeks, I have gotten my completed driver's license; me and my dad are getting along better than ever before; me and my boyfriend are a month away from celebrating our 1 year anniversary... And I still feel nothing... 

It's almost like I was high for a few months and all of a sudden someone flipped a switch and I was left feeling like this... I hate it so much!!! I feel like I'm not myself!! 
I loved being happy and making jokes and laughing all the time but I'm not like that anymore and I don't know what to do about it.

I keep doubting myself and my self-esteem has been even lower than usual. I dislike my body and cry when I see the numbers on the scale (I have been eating right and exercising regularly even with college but because of some meds I take for a specific health issue  [Grave's Disease] I haven't been able to lose weight and just hold on to it). I doubt if I'm smart enough to stay in university or if I should just quit. I doubt if I am pretty enough, smart enough or even worthy at all of having my friends and my boyfriend..
And worst of all, I wonder if I'm falling out of love with my boyfriend... 

I have talked about this with my boyfriend and with my mom and they have asked question about it that I don't know how to answer. What I wrote here today is the best explanation of my feelings I have been able to get out of my brain in a while. I feel completely lost even with their advice and support. 
My mom has said that my birth control pill might be messing with my emotions as well as my weight, since I started taking it in September of 2019 but I have been having these feelings since the summer...

Reddit, can you give me some advice? Have any of you felt like this? What do I do?
Thank you in advance.