This is a throwaway account, as I don't want my SO to see this. 

Me (F18) and my girlfriend(F20) have been together for about 11 months and have already been through quite a few rough patches, mostly because we are both very emotional and have a lot going on around us. For the last few weeks everything has been going decently well but I just don't feel the same as I used to. 

We were friends for a while before we started officially dating and we even helped eachother through past relationships. She is completely head over heels in love with me and I used to feel the same way but lately I guess the spark is just gone. I feel like our relationship has become a routine and honestly my feelings have become less romantic and more as those of a bestfriend. 
Our affectionate and sexual relationship also has gotten semi boring for me and honestly feels like the same pattern everytime enough to the point that I don't even want to bother anymore. 

My girlfriend is also very close with my family so it may be awkward afterwards. She's been dumped before and everytime it's taken a dark toll on her. I feel like she's the closest thing to my perfect match that I'll ever find so I don't get why my brain is becoming indifferent towards her. 

I must add that I suffer from severe and chronic depression so I'm not sure if that may play a part. I know breaking up with her would tear her apart as we have a plethora of future plans and have even talked about marriage, adoption, and moving internationally.

I don't want to break her heart or do anything I might regret but I have know clue how I can stay in a relationship with someone I now only love platonically. 