I think its healthy to keep in mind that relationships are not an "end all", lots of people think they can just find the right person, settle down, and they'll be happy. But as you've experienced, that's often not the case. So I think your smart to take things slow with a new mate, but that doesn't mean you have to enjoy it any less. Relationships are a constantly evolving connection. Things change, all the time, for good or bad or both. This is normal, its human nature. So take it one day at a time and have fun and love without attachment. Most of all remember, to love yourself first.