Gf feels awkward while kissing
My girlfriend says she feels a bit awkward when it comes to lip kiss (neck kisses and soft lip touches is okay with her). She says she tries but then she goes out of mood. I dunno why because we actually had a many such good moments. Recently she started refusing and today we cleared the matter about it and she said the above. I'm dead sure she is in no other relation other than with me (obvious).
Respecting her feeling and as a good boyfriend I need suggestions. How can I please her other than kisses? Hugs is all we have every second we meet. Need something amazing please.
Help me.