Confused About Love

i am really confuse about what is love anymore. I have been through several relationship but the love just seem to fade away. i have been together with my boyfriend for a few months but now i dont know if i really love him. now there seems to be other people who make this relationship more confusing and complex. currently, the people who are closest to me are my boyfriend, and 4 other guys A,B,C and D.

For me and my boyfriend it was love at first sight, He made me forgot the pain of my past relationship and moved on to loving him. However he will be abit jealous when I am around the other guys. I can understand and try not to flirt around that much. However i still have some mixed feelings. From the first day I know A, he flirted with me and i flirted back. He would comment on my clothes and looks. He liked it when i wore tight miniskirts and low cut tops. I enjoyed being around him alot and would tell him all my secrets. However A is much older than me so i just flirted without being serious. My relationship with B and D are similar, we will talk endlessly and we would hang out together and there is alot of touch in our relationship, like cuddling and hugging. However we are just friends with B, but i feel that i start to like D abit. C is a person who i will confide everything in even more than my boyfriend. I just feel safe telling him all my secrets. I made out with C a few times and started to have feelings for him. However my boyfriend sort of sensed something wrong with C and asked me to stay away from him. I dont know if i should continue flirting with A and B and if i am in love with C or D, when i am alone and lonely i think of my boyfriend but I will also end of thinking of the times spent with C and D. I sort of miss having them by my side. I am really confuse about who I love now