What do I do next

Hey I'm a former preoccupied that's now secure and I'm dating a avoidant-dismissive. We've been in a pattern of seeing each other then withdrawing (him) since 2012. Sometimes he would pull away and sometimes I would end things because of his behavior or lack of commitment. Last time we separated was February 2016. I had felt like he was pulling away (texting less and not asking to see me) so after we went out and spent the night together, I decided I'd let him initiate the next contact (something he rarely did). Well I didn't hear from him until August 2017. Everytime we've separated in the past it was always me that started thing back up. I think he was waiting for me to do what I've always done. The difference this time is I was truly tired. So during the time apart I enrolled in college, dated other guys, and focused on myself. I believe it's during this time I became secure. The accomplishments I made really boosted my self esteem and I realized I am worthy of great things. I learned to enjoy my times alone also. I'm not going to lie and say I didn't miss him (I cried MANY nights) but I refused to give in and reach out. We remained friends on social media during that time and he would frequently like or view my postings and I his. When he finally contacted me, it was randomly about something I posted. We started talking and all the feelings came back. He asked me out on a date and it began again. This time it was him initiating the dates, him asking to see me, and even him surprising me with a birthday present (I was SHOCKED). He even started to become passionate during sex. Kissing me passionately and more frequently than before. Until recently we were seeing each other once a week. We would go on dates. he would even talk abt things we can do together in the future and invited me to go camping with him (something he usually does alone or with random camping ppl). Then it all changed. I think I triggered him by 1st talking about our last split and getting him to admit that he missed and cared about me. Soon after I asked if he wanted to go on vacation with me some time this yr because I heard of a really affordable spot. He never answered that question. I let it go and was chatting about what we would do when we got together during our usual weekly get together and he listened. The next day I see a pic of him on social media.. he's on a plane. He went away for the rest of the week n weekend. I texted him saying that I was shocked he didn't mention it, especially since I was just going over plans for us getting together but I still wished him a good time away... no response. That's when I found out about the attachment styles. I sent him the link about it.. no response. 2 days after his return I get a text apologizing about not saying anything about the trip. He said he didn't see it as a big deal but now realizes he could have mentioned it. He also apologized for taking so long to respond. I told him I appreciate his apology and communication is something we can both work on. After that we spoke as usual. Then I asked if he was free this week.. no response. He sidestepped the question and spoke about other things so I asked again.. no response. I don't know what to do next. I can honestly say I love him but i made so much progress and I don't want to go back to that cycle. I don't mind him needing alone time or wanting to wait longer before getting together, I don't need constant attention. It's the not communicating that is frustrating me. The ignoring what he doesn't want to talk about. Is there anyway to help me deal with it better?