Are Having Emotional Deprivation And Lack Of Interest Signs Of Depression?

Hi, I m 18 years and I ve been having some issues. See,last October I realized I wasn t feeling at all. I found this very strange because it never happened to me before. Then, in November I started to feel very lonely and empty.I was still numb and I was bored most of the time. I also had some mood swings sometimes and I started to feel down too. In December those feelings fade a little, The in the second week of January the came back but this time worse. I was feeling more lonely, I was experiencing a lack of interest and motivation. There were days I didn t feel like getting off my bed. In March I started to feel worthless and hopeless and April I started to have suicidal thoughts almost everyday several times a day for a couple weeks. In early May all of those feelings banished except for the emotional numbness. I would like to know if this is depression or something else because I ve read so man diffrent things on the internet and I don t know what to believe in. Thank you