Should i text my ex bf?

I broke up with my ex but miss my ex bf and he has a new gf since september. I broke up with him in May but i was in rehab till October. He was very mad with me, and recently started cooling down. I have not contacted him, but i miss him so much. We work together n i just ignore him but i always notice him staring at me and so do teh otehr co workers. Should i text him saying i miss him? Ive been just ignoring him, but it seemes 2 make him more mad. I just wnat to be with him again...