My boyfriend is being weird ?? HELP PLS

Me and my boyfriend have been together for 5 years and we don't hang out anymore like we don't go out to places, we barley have sex anymore or talk as much and the other day he came out of the nowhere and keeps asking me to MARRY him ... which is weird like so weird I figured he was getting tired of me so I've been stressing and now he came up with this is it me or this shit is confusing as fuck? We live together and he works from 6 to 4 which sucks I miss the sex soooooo much when we do have sex it's sooo amazing, I miss the conversations how he was my best friend and how awesome it was to hang out with him all my friends wonder why we're still together they feel like we're trying really hard to make it work but I don't know how to feel about it :c FML FML FML