My bf giving mixed signals

r/

We were classmates.currently( im 18 f)he is also(18 m)back in school days he was my biggest crush in school and we used shy away from each other…and he confessed to me a month ago that he is in love with me and we got into relationship

                                                                                Everything was going smooth but sth strange happening whenever he has no mood he avoids everything he doesnt pick up my call and apologized for it and he became so self centered over confident from time to time...and lately he is not consistent like other days....     

But Idk honestly what to do,i came here for advice ..
He is pulling off and starting to become distand he was so close 2 days ago and ngl yesterday sth confusing weird happened so thats why im thinking about this relationship..

                                                                                                I asked: who am i to him 

He replied:my lover
I said:that’s it?
First he reacted with thisđź—ż He said:this is the most honorable title u can get as a human..
And i didnt text him back or replied just keeping silence,caz it is a bit offputting and it fucked me up dont know what it exactly means amd dont want ask what he meant by saying that … but im feeling it is a bit off energy..

What is the best thing i can do right now ???is it red flag?

TL;DR: I asked my boyfriend what I mean to him, he said “lover” and it made me feel hurt, like he’s not serious.