What do I do?

PLEASE DONT IGNORE ME 😭😭 okay so my SO & I have been together for 3 years! We live together but are not married yet & don't have kids ! First year everything was perfect, he was so romantic ALWAYS! He would always bring me flowers to my house & tell me I'm pretty & that he loved me ! Now, he doesn't care! He doesn't tell me I'm pretty, he doesn't tell me anything sweet 😞 I don't think he's cheating on me because he always lets me see his phone & well he doesn't go out, he doesn't like to! But I don't know what's going on 😔 I've tried talking to him a lot of times but he doesn't change! When we go to sleep he doesn't really hug me, he'll just turn around & go to bed! We don't make out 😔 only when he's drunk, he doesn't hug me like because he wants too! He hugs me because I tell him too, I just feel so alone all the time 😭😞 ! What can I do? 😞 right now he's been in the bathroom for 30 minutes, he said he was going to take a shower but he's just sitting on the toilet listening to music!