The direct approach would be to ask your ex (rather than us). The indirect approach would be to assess the degree of friendliness that this person exhibits toward you.
if she still flirts with you she wants to be your sexting buddy. if not she just wants to be friends (opposite of a physical relationship)
He probably either is trying to tell you that he want's a relationship again, or he just wants to have sex.
it doesn't have to be that he can say he wants you again and mean it all over again. but he's in a relationship so he can't be with you.
Talk to him about it. Ask him what he is expecting out of the relationship with you, whether it is friendship or if he wants something more.
the relationship is when someone wants something is demand and that is where its willngness started if he/she is leardy can pay immediately.
It means he wants to be physical with you but doesn't want a formal relationship.
If he is just physical, just try asking him
It depends on what kind of a girl she is Ask her
Beware, he's keeping his options open, he may have a relationship but he's always on the lookout for something "better".
He wants your jorb He is interested in a physical, not an emotional relationship with you. He wants to be intimate but without any attachments.
You know if he wants a relationship with you if he says "I want a relationship with you"
Friends don't generally kiss often and this appears to be more of a love relationship at least on your part. Communicate with her and tell her she either feels something for you and wants to kiss you or you are not kissing her again.