<human>: Summarize the given text in a few sentences.

Hi all- 

So I recently (mid-January) was dumped by my then-girlfriend [22F] of around 4 years. We had been having serious issues for 6 months, and to be honest, it was as close to mutual as I think a break up could be. It wasn't clean, we lived together, and there was a lot of fighting while she moved out - but it certainly wasn't horrible - and a while after she moved out we exchanged 1 or 2 messages that kind of cleared the air.

Anyways - in mid February I met this great girl [22F] and we eventually transitioned into a friends with benefits situation. She had brought up a relationship and I told her I was not ready (this was late February). This girl is great, we have a ton in common, we have a very similar sense of humor, shes gorgeous and we are very sexually compatible. There's definitely an emotional attachment from both ends. I can't stop thinking about her and over the last couple days have been thinking about starting actually dating. 

My main hangup is that I don't know when I am "ready" for a new relationship. Is it something that I'll know if I am truly ready? Is my infatuation with this girl skewing my sense of readiness? I still think about my ex somewhat frequently - maybe every other day. Not even in a fond way - she just kind of pops into my head if something reminds me of her. Is this a sign that I am not prepared for a new relationship? Am I missing out on some fundamental building of "self" by thinking about jumping into a relationship?

I guess what I am really looking for is to know what constitutes being ready for a relationship. Any advice is welcome!
<bot>: How do I know when I am prepared for a new relationship ~2.5 months after a 4 year one has ended?