relationship advice needed asap!

so I've been in a relationship with an older guy for nearly a year now and recently I've started having feelings for one of my closest friends and I know the feelings are mutual but this whole situation is messy.. I haven't been able to tell my friends about who I'm dating because of the age gap and it sucks.. there's been lying and cheating (messages and seeing girls and lying about it more than 5 times) all through this relationship and I feel as if I just want out but I'm scared because we've been through so much 😔 
please help me 😭