Feeling unwanted

So my boyfriend and I have been together for 2 1/2yrs ... we live together. ... a few weeks ago he said he thought we should take a break. ...I against my will stayed the night at my mom's house. ... since then (about 2yrs weeks) he's gone out drinking, gone to his friends house, and had people over. .. never letting me know 1st ... I'm feeling like I don't matter. .. I mean he's a great guy by far but this sudden urge to do whatever he wants is getting to me ... am I crazy? What should I do?