When i was with my last girl friend i was happy for the first month?

when i was with my last girl friend i was happy for about the first month of it but then she started to make me feel presured and she expected to much of me i felt she was suffecating me. anyway in the end she decided she would acuse me of having sex with another girl when i didnt what so ever so. she dumped me and my feeling for her were dieing anyway so i just let her leave me and for a while i felt her foot was lifted from my head and i felt free and wanted to be single for a while but recently i just want a relationhship so bad is it normal to suddenly change my mind like this after all the rhings that happend with the girl who left me