help me.

i think i may have fallen out of love with my boyfriend/ babys daddy..there are a couple of reasons why but one of them is the fact that one of the guys i work with has been flirting with me hardcore.he has been for a while but before i kind of always just blew him off but lately i havent and i thinl its because my boyfriend never shows me any attention at all. ive told him over and over. it never changes.. without meaning to ive started shutting my boyfriemd out and hes picked up on it so he keeps asking me if i love him still and i definitly do im just not in love with him anymore and ive really been liking that this other guy has been flirting with me.. what should i do?