Guys only!!!! (psst girls you can help out also ;-) )?

ok my ex-bf just texted me today shockingly...we broke up like a month ago and we haven't talked in a while and today he texted me and said he wants to be friends all over again! Does this mean he wants to get back with me? or he misses me a lot? I know he wants to be friends.. Guys and girls do you Text your ex-gf/bf just because you miss her/him or etc or just to see how he/she is doing when you only ask to be friends?