Boyfriend religion problems?

I am 17 years old, 18 in 2 months and i am going through the hardest time of my life right now. I'm working 2 jobs and taking a lot of college credit cles in school so i'm super busy. I'm dating a guy who just turned 21 and is lutheran. My whole entire family is mormon and that causes problems. For a long time i have been wondering about the church and have wanted to explore others but i wanted to wait till i didn't live at home to not cause fighting. So i've been going to church and everything to make my family happy. I believe that there is a god, and we go to heaven after we die depending on how we lived our lives and that we can pray to repent. About a week ago though my mom banned me from seeing my boyfriend because she wants me to get married in the temple and we are serious dating and she's scared that I won't. I probably will end up not getting married in the temple no matter who I date. My boyfriend and i have talked about getting married before and i love him so much that i'm almost positive it will happen within the next 2 years. He doesn't know about his church either and we want to find a church that we both believe in and love going to. I live in Utah so the majority of people are mormon. My mom threatened to kick me out yesterday saying if i didn't want to live by their rules than i can leave. My boyfriends family loves me and said if there were ever any problems i could come and stay with them. I hate being at home right now because everyone is constantly fighting and crying. but if i left my relationship with my parents would never be the same. The church is so important to them, I feel like its more important than me sometimes. The only time I can see my boyfriend is when he comes and sees me at my work. We've been dating for 10 months, and My parents took away my laptop, phone, and car keys because they don't want me seeing or talking to him. Also I bought him tickets to the jazz game next week for christmas that were very expensive and i got us really good seats. I want to go so bad but don't know if i can right now under the cirstances.. any advice on how i can keep my boyfriend, my family, his family, and be the religion I want to? thank you!!